A crescent wrench can be used for many things, so that's what I would suggest if you're short on tools.
Did you put the fiber gasket between the reg and the tank? You need to get it really tight, and then check it every so often to make sure it stays tight (mine will loosen sometimes... don't know why).
Keg #1: Brown Bomber Bourbon/Oak Vanilla Porter
Keg #2: The Bollocks ESB
Keg #3 Lawnmower APA
Bottled: Mjolnir Mead, Lazy Daze Hefe.