Since Dhruin hasn't responded I'll pitch in…
Yes, I think you mentioned block, roll, light hit, heavy hit? and targeting?
Yes. Targeting is basically mouse-based, you turn mouse to another enemy and Geralt automatically chooses that foe. Rolling can be done by double tapping the direction keys, OR by pressing a roll key + direction key simultaneously. Double-tap sensitivity can be adjusted (in preview copy via .ini file, presumably in full game as an option). Block drains Vigor if you're hit, so it's only useful if you have it developed and used a proper potion that increases Vigor. There's also a skill that reduces amount of Vigor lost while parrying, perfect for melee-only Witchers. Vigor is used BOTH for Signs AND for blocking btw.
Also that you could get a skills to attack from a far like throwing daggers? how does that work?
Throwing daggers is much easier than throwing bombs, but still requires a pretty long pause while Geralt readies the throw and selects target (by mouse; there's also a key to lock onto the enemy, didn't use that though). You enter a "sniper" mode like with bombs (view from Geralt's shoulder) only there's no glowing target reticle, and as soon as you release he throws the knife. Knifes are unretrievable as far as I can tell, but you get some fairly early on and the skill is very easy to obtain. Also, daggers deal a lot of damage, and a bonus damage to humanoids.
Also there is a free-form mode and a targeting mode?in the free-form one you could hit anything your sword/throwing daggers collides with?
Well, to be honest there's no necessity. Mouse targeting works well except if you're diagonally across the enemy and there's some obstacle nearby; then the game weirds out and you can waste a few hits, they go in air. So I assume, free-form as such is not there. BUT, there's a skill that makes Sword attacks all AOE/hitting several enemies at once. This one will probably make sword strikes more free-form.
Can you jump in the combat?
No. Supposedly there's a way to dodge OVER an enemy, sorta roll over his head if he's kneeling, but haven't been able to activate that even once hehe. There's a roll with a piercing attack though, that's nice.
what happens if you try to run-away from enemies?
Sentient ones will follow you everywhere, even into houses or into the city/out of the city. Monsters give up chase almost immediately. Didn't notice the health regen, but I assume you can't just weaken them — heal up — return.
What does it cost to use skills? does hp, mana etc auto-regenerate very fast?
Hp autoregen is the most valuable part here, since you can't drink potions in combat. Armors and runes can add vitality regen. There're two expendable pools: health and Vigor. As stated above, Vigor is used for blocking, countering and casting Signs. Health is quite obvious. Health and Vigor have in-combat regeneration (low and based on items or potions, with Health/Vitality being hard to come by and sought after) and out-of-combat regeneration values. Many potions affect both regens, some at the cost of overall pool available (see which
here). Sheathing sword doesn't mean you're out of combat, you really have to be away from enemies. Skills are for the most part passive tweaks that change existing possibilities. The only activatable skills come at the end of 3 trees; those are related to Adrenaline, a third variable "pool". Depending on your skill tree, Adrenaline can be generated by sword strikes, overtime when poisoned (by means of potion toxicity), or by Signs use. After filling the Adrenaline bar, you can "cast" its related ability (also derived from skill trees) using "X" button. There're three such abilities/skills:
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Whirlwind (swordsmanship tree) increases substantially resistances and chance of critting the enemies (while its predecessor ability,
Combat Acumen also allows to perform group finishers when adrenaline bar is filled),
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Amplification (alchemy tree) which increases overall resistance and damage, provided you're under the toxicity effect from potions with its predecessor,
Mutant granting Berserk ability (activated by X when adrenaline filled) that increases damage and resistances, and
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Control over the Power (Signs tree) which substantially increases power of Signs and grants biggest resistance bonus, plus its predecessor,
Magical Sense grants another new Sign, Heliotrope, which presumably allows entering the "radial menu slow-down" on demand in combat (i.e., slows down the passage of time; also only after filling the adrenaline bar).
Synergies between last two talents in each tree provide best bang-for-the-buck as then Geralt can just stay in high-Adrenaline mode almost all the time, and occasionally "drain it" (by pressing "X") to activate those special abilities. Not sure how long they last though. I presume that talents are limited in amount so that you can't just have all three at once, but who knows...
If there are beasts and humans do you need to keep switching between normal swords and silver swords in the battle?
Yes. However, if you use some oils you can still use Silver sword quite effectively against humanoids. Brown oil, for instance, makes almost all sword strikes open wounds (DOT) so even if damage dealt is negligible, DOTs will finish humanoids off in time. You can also use species-specific oils as in Witcher 1 on steel swords AFAIK, but not sure what results that would produce.
What kind of things can you equip? sword, armour ? anything else?
-Swords or other melee weapons (lots! I was running with a shovel for a long while, also tried giant Spoon. FUN!)
-Bombs/Daggers/Traps (pockets, you see one pocket by default in HUD, there're 5 total available in the inventory that can be filled, you then select which of the pockets will be under hotkey with the "active slowdown" radial menu).
-Chestpiece
-Gloves
-Boots
-Trousers
-Trophy
Hope it helps
