You turn them in to the basement in the Villa, your uncle will show it to you once and you will always be able to go back.
Assassin's Creed 3 hasn't come out yet, but in Assassin's creed Brotherhood you get the "In Memoriam" trophy or achievement.
no. If you could, it wouldn't be called assassins creed 2.
Yes
No.
Yes you can.
Yes you can turn 3d on and off.
mute button
No you can not unless you are using a PC
Turn the sound up
yes
Press Ctrl+T when in game, worked for me.
Blood can be turned on or off.