You can use the xbox 360 still but the adapter or an Ethernet cable enables you to get xbox live and play online
There's no point? The Xbox 360 will play any DVD without anything but a controller or a xbox 360 remote
Use an ethernet cable and plug that in from your modem or a router then into your xbox 360
Yes.
The only way to copy Xbox 360 games and play them on your 360 without using a modchip is to use the guide at:http://copyxbox360games.blogspot.com
Yes, it is compatible with all XBOX 360's.. NOT XBOX 1
No you need XBOX 360 controllers.
The only way to copy Xbox 360 games and play them on your 360 without using a modchip is to use the guide at: http://copyxbox360games.blogspot.com
The original Xbox controller doesn't work on the 360.
Yes you can.
you don't need too, you can use xbox games on xbox 360
sometimes but not always