Also, do the teams have codex's like WH40k.. how do you find out about each model etc.. or is it all in the rules?
Yes, all teams are listed in the Living Rule Book (LRB).
what do I need to play the game, and where can I get the relevent bits needed? Ive looked on the GW online shop and all it has is the boxed set and teams.
You need to buy the boxed set. It contains the board, blocking dice (which I believe you can buy separately if you wish), a passing ruler, two scatter templates, two dugout boards and a bunch of tokens and stuff..
I'd recommend finding someone who has the boxed set and try to play a couple of games. Then, if you like the game, you really should buy the box.. If nothing else, as to prove to GW/Fanatic that the game is something we want them to continue developing..
-- Christer