personally, i hate tricams.
Tricams are a visceral issue, and the strong personal opinions of the people on this board are something that the OP will come to harbor in one direction or another over time.
I suggest walking into Rock and Snow and asking the guys there for assistance. They are super nice, knowledgable and more than happy to deal with gearheads. Plus if you buy a bunch, you get a free one with their cam card program (if its still on...)
Based on Murphy's comments though, i offer the following JOKE of a gear list:
double black aliens. Better learn to use them now.
double 00 metolius's. See above, you want to be comfortable with them before you get on the 10s and 11s that you'll need them on.
HB bronze offsets. Forget about the #6, you want the #3,4 and maybe a 5.
a grabbag of about 20 nuts. DMM Peanuts are great, then some of the 1-4 WC rocks, or the 1-5 BD nuts. You don't need nuts over #7, they're too big to place anywhere.
A double set of the alien offsets.
Two red camalots for Stannards Roof.
A gold camalot.
A couple of locking biners. I prefer Petzl William Screw Locks cause they're really big.
Find some camp sliding nuts. You'd better learn how to use them now. Ask somebody to show you how to modify them with shrink wrap so they don't stick on crystals.
Maybe a red, and an orange metolius cam just in case you're climbing easier than 5.9.
That should be all you need for that first rack. NOT.
Look: what you like is intensely personal. It all works if it's got a CE stamp or certification, and you will probably be better off with what you like. Shoot, I even have friends who like tricams! And those HB injector trigger cams!