Welcome to the forums.

Amazon have a pretty good deal on the Xbox 360 250gb. It is currently £179.00 but for an additional £5, you can get a relatevly new game. Link: http://www.amazon.co.uk/gp/feature.h...d_i=Xbox%20360

That comes with pretty much all he will need to get started (the console has built in wifi and comes with a controller and all the cables he needs to get started). When you sign up to Xbox Live for the first time, you get a months free trial for Xbox Live (for online gaming).

If he is into Call of Duty or Gears of War, Game currently has an offer on their Call of Duty and Gears of War consoles. Both consoles come with a 320gb hard drive, two controllers (a normal console only comes with one controller) and a copy of the game. The Call of Duty console is £209.99 and the Gears of War console is £199.99. Both consoles are limited edition. Link: Shop Xbox 360 at GAME

I hope that helps, but if you have any further questions, just ask