Xbox 360 info.

Idiophreak

"Would I need to buy the core or the premium package? Whats the difference?"

Premium has:
a silver tray (not a white one).
A cable for HD
A wireless controller
and
A 20gb HDD.

I'd recommend the premium, but you should be able to play online on the core (just not save any games...)

"Also how do I connect it to the internet? I have 2mb wireless internet, is the console wireless or do I have to buy an adapter or something. "

Best off just sticking an ethernet cable in the back of it (no packet loss etc etc). Failing that, as everyone else says, either the official MS adapter (£55) or an ethernet bridge.

"Also I have to subscribe to an xbox service or do I plug in and play?"

You can do everything but play head to head on a silver subscription (free). If you wanna pro evo it up, you need a years' gold membership.

Just so you know, the best bundles at the mo (check woolies and gameplay) seem to be around £300 for 2.5 games (two good, one older...say GoW, Crackdown and Pro Evo) and the entertainment pack (PGR, live arcade and extra controller)...

Idiophreak

Actually, according to xbox360.com (who ought to know) in order to do anything on live (even have a silver subscription) you need a memory card or HDD...so the core console really is crippled...