Yes rats should be kept in pairs or more.

How on earth did you search for pet rat care and not come up with like... a million pages?

Weirdo.

here's the first page that came up:

http://www.petratscanada.com/ratcare.htm

and the third:

http://www.petwebsite.com/rat_care.htm

If you hit a snag, and have a specific question, just shoot.