Yes.
If you have auto downloads on, your XBox will automatically download any arcade demos. To use this, you must have a hard drive.
you need to be logged on to xbox live to put downloads. The downloads are soundwave, Jetfirie, Sunstorm, Jazz, aerialbot and sideswipe.
I do not know what you mean by "plug-in", but yes. The first way to trade downloads from one Xbox 360 to the other is to put it on the Xbox 360 memory card. Note that this can only hold 512 Megabytes (half of a gigabyte), and is expensive. The other way, the way that I recommend, is to transfer your Xbox Live profile that you bought all your downloads with to another Xbox 360 and then download them all again. (Note that this will, of course, only work if the Xbox 360 you want to transfer all your downloads has Xbox Live.)
you buy a card at a store for xbox live and enter a code. That code gives you points. With those points you can purchase downloads
go to xbox LIVE marketplace and there is a huge list of downloads
Not at all. However, an Xbox 360 will play some original Xbox games with special downloads.
xbox live marketplace or www.xbox.com
No, It is an Xbox live arcadegame
Not if you are at the dashboard, this is with the new update that gives you avatars, go to the My Xbox panel. Scroll right to System Settings, click on Console Setting, go to Shut Down, Turn background downloads on. Now you can shut down your 360 and still be downloading. Once your downloads are complete then the Xbox will turn itself off.
No
no i don't think so
You cant you have to download them from psn or xbox live