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 turn 3d on and off.
Yes you can.
mute button
Turn the sound up
No you can not unless you are using a PC
yes
Press Ctrl+T when in game, worked for me.
Blood can be turned on or off.