How to connect HP laptop to internet?

[dan]

I just got this laptop: http://www.pcworld.co.uk/gbuk/laptops-ne...4-pdt.html

And i don't know how to connect to the internet. I'm not tech savvy so i'm really confused about this as with my iphone and ipad i've just had to enter my code and then i'm good to go, but now it's asking for a username and password and when i entered what i thought it would be it said it was wrong/couldn't connect. Do i need wires? I have the BT infinity black router with the pull out thing with the codes on so i tried them but no luck? I'm really confused please help.
Thank you, i've done it now. Also no, mine never came with much information. But thanks!!