I think it is illegal to modify a game save on the Xbox 360 because you are editing a genuine save file which shouldn't really be messed with.
yes if you modify you xbox
It would not be smart to try, that is pirating the game and therefore illegal, but it will save you a lot of money
Game information saves on the Xbox's hard drive.
Yes. Saving xbox game data works almost exactly the same way as saving xbox 360 game data.
You ask someone for it, or download it from some p2p thing, but that would be illegal, and you would need to modify your xbox to play it anyways
You can't
You don't have to save. after you are done you game just exit the game and it will save automatically.
No, that would be the start of pirating the game. Pirating games is illegal.
yes
You can modify the hard drive size. The hard drive is located at the bottom of the Xbox. There is no other part to modify the Xbox a part from taking the console to bits.
yes
No, It will not save game memory.