the things that were recommended to me, and that I've found to be the most useful:
1. A good bastard file. You will make mistakes when you cut, you will need to file.
2. A good set of needle files. (see above.)
3. A jeweler's saw frame (at least 3" depth) and a selection of saw blades- trust me, get plenty of practice holding and cutting with your saw.
4. Saw blades- Buy a lot of blades (seriously, start with at least a dozen. Size 2 is a good size to start with, they don't break as easily.)
5. Bench pin- I realllllly like the ones with the built in anvil, it's super convenient.
6. Ring clamp- wooden, won't mar the metal. Nice things to have around!
7. A dremel and a cordless drill (or just a dremel with plenty of drill bits) - one of the drill bit indexes with a huge assortment of drill bits is nice to have, too.
8. Appropriate safety wear- meaning goggles, leather gloves, face masks and ear plugs. Take care of your body!
9. A large assortment of sandpaper grits (50-800 grit was what was recommended to me. I usually use 200-800)
10. Metal sheers, for cutting solder.
11. Silver solder (hard solder was what was recommended to me, and it is really good for beginners.)
12. Flux and pickle and a dedicated pickle crock pot(if you're gonna solder metal, it's pretty damn important to do it right.)
13. A torch. You can use one of the little brulee torches. Also appropriate tools for protecting your work surface from the heat. Alternately, learn to rivet. They're pretty fun and make a really nice look.
14. Scribe- for marking your metal. Sharpies are nice for making removable marks as well.
15. Chasing hammer- it's a really good all purpose hammer, I use mine more than anything else.
One thing I really want to recommend is that you pick up some cheap metals like copper and brass and work with them for a while until you get comfortable. When I was taking classes, 12g was what we ended up starting out with- yeah, it's thick... but it makes for excellent practice.
I found that you can get a lot of supplies for this sort of work at www.riogrande.com
, as well as hardware supply stores- needle files, larger grit sandpaper, dremel, scribe, sharpies, drill, and safety wear are all really easy to find at just about any hardware store.
Bench pins, saws, solder, hammer, clamps, etc all would come from a jeweler's supply store-