Nope, it isn't possible
yes...in fact its only in story mode
You get to fight in historic battles like the battle of bunker hill during the story mode of assassins creed 3
Yes, and you can even pick your own character.
Sequences 12 and 13 are downloadable content that cost Microsoft points on the XBox360.
no, but you can download extra content from xbox live
You don't get a stone tomahawk until your teenage Connor and you get an assassins tomahawk when you get given the robes for an assassin when your grown up assassin. If you keep playing the story mode, eventually you will get the different types of tomahawk
Yes, it depends on what games console you have it on. For example: If you have it on the XBOX 360 you have to have XBOX live.
10.Minecraft story mode 9.bully 8.crysis 7.batman arkham city 6.far cry 4 5. Assassins Creed 3 4.assassins Creed 2 3.blood borne 2.roadrash 1.GTA 5
Masterbate a donkey until you here a Kazoo. Hope that helps
Yes you can. Just go to the menu and go to options and turn off blood mode.
I don't know if/how it can be done in Assassin's Creed 2, but in the first Assassin's Creed you can kill anyone without penalty after completing the game and replaying story mode. This site might make that a bit more understandable: http://www.cheatcc.com/xbox360/assassinscreedcheatscodes.html
Brotherhood picks up right where 2 leaves off. So if you are looking for Story, start with 2, however brotherhood has a multiplayer mode, which is pretty decent.