Yes
put you gamer tag down and i will tell you Modding an Xbox Console will lead to an Xbox Console Suspension which will not let you play ont that console anymore. Modding a console is taken very seriously by the Xbox Live Policy Enforcement Team.
Not without modding which is frowned upon by Microsoft and voids your xbox warranty.
You can do it by modding your xbox 360. But it is very dangerous as virus can be transmitted through it.
It gives you a console suspension from the Xbox LIVE Service. Where you Xbox 360 console will be usless where it cant be used anymore.
Modding your 360 does not affect anything in a negative manner. Your original discs will work the same as they did before. -Personal experience from modding XBOX 360 for 3 years.
Modding affects the console.
NOOBS
No you cannot. Modding is only for computer games
no it only affects the modded account.
I wouldn't want to know because you can get a suspension from modding on Xbox LIVE
Yes.
Yes especially online modding.
You get banned for modding anything dealing with an Xbox
Yes
You have to be in possesion of an J-tagged xbox its a modefied xbox capable of modding games, hacking and hosting a mw2 lobby google it
There are many sites which provide you with information about modding a xbox 360, however, this is very illegal and should not be attempted.