check out ebay... they have everything you need
I buy a good amount of my hooks off of this guy
http://stores.ebay.com/Gypsy-Outdoors_W0QQssPageNameZstrkQ3amefsxQ3asstQQtZkm
I second most of what has been said. Only tying for 2 years now, and getting much of the info I needed to start from the guys on this site, they are a great reference. I bought a kit and use maybe 50% of the materials. I was on a tight budget like you and it was atleast enough to get me started. I have probably spent several hundred dollars on new materials since. If you're getting into tying to save money, FORGET IT! Maybe if you tie for 50 years or sell your flies (still not worth it) then you might be even on your money. Do it for the enjoyment of tying. I love tying. It's relaxing to me and helps me unwind from a busy day at the office. It's also a blast to catch a fish on your own fly, give them away, and see your skills improve.
Back on topic, buy a vise, scissors, bobbin and whip finnisher. Then just get some basics
Here's a small list of what I suggest.
Hooks
variety of Nymph, Dry, streamer and emerger
Feathers
a few colored necks - shades of brown, a black, grizzley, and white
marabou - same colors as below
saddle in brown, black, white and olive for buggers
and misc feathers... peacock(a must), goose biots for princes and stones
dubbing
dry fly dubbing (both either in a dispenser or buy separate)
wet fly dubbing
misc materials
thread in different colors and diameters
beads, lead wrap, tinsel or wire for ribbing, finishing cement (clear nail polish), egg yarn (easy pattern), chenille for buggers.
When you buy all these separate you will have all the right things to tie many different flies. If you can't afford it, just buy a kit (yea I said it). You'll have some less than decent tools, and half of the materials are not able to be used, but atleast it will get you started for a minimal cost to see if you like it or not. The above materials, in my estimation will cost...in the range of $250-$1000 depending on quantity and quality of products. Christmas is just around the corner... if you can't afford everything, ask for gift certificates! (unless you know a good tyer, don't trust family to buy you the right thing unless it is highlighted in a catalog, which still doesn't always happen).
good luck and always ask questions.