There is a plug in the bottom of the 360 controller. Plug the headphones into there.
No the Xbox live app on windows phones is able to link to an xbox 360 but it also has games that you can buy
No you need XBOX 360 controllers.
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
No.
No.
No.
yes you can use the xbox 360 controllers on the xbox 360 slim. I use my controllers from my old xbox on my new 360 slim.
You can not play xbox 360 games on an original xbox, however you can play some original xbox games on an xbox 360 console.
Yes