Hooking up Xbox Live

[Vampyr]

So recently I got DSL, and I'm wanting to hook up my Xbox to Live, but I have no idea on how to do it.

First of all, what will I need to hook it up? My DSL connection is in my living room, which is on the other side of the house from the Xbox. I'm kind of an idiot when it comes to broadband connections, so what do I need to buy to set up a connection in my room? And will I be able to be online on the computer and online on my Xbox at the same time?

Thanks in advance.