I'm a drummer so I get asked this a lot.
-Get cymbals that are, if not great, at least decent. You will regret it otherwise, no matter how easy it is on the pocketbook. The best way to go about this is to buy them individually. Used is generally to be avoided with cymbals. Sabian is your best bet for all around good bang for the buck. Take a friend to the store. Listen to some music on the way over that reflects a good cymbal sound. Do blind listening tests on all the good cymbals and compare notes afterward. Then talk to the store owner and tell them what you liked and see what kind of deals you can make.
-Some good/cheap snare drums are: Premier Genista, Ludwig Acrolite, Ludwig Supraphonic, anything by Taye, Mapex Black Panther, any metal Slingerland/Musicyo. Aside from cymbals, a decent snare drum is second in line for quality.
-Used is a great way to go. Use ebay. Doing a little bit of research goes a very long way here of course, but I've bought (and sold) some great gear at incredible prices on the bay. Pawn shops are hit and miss but if you have someone who knows what they're doing along for the ride you should be okay.
-Skimp on hardware. Chances are you aren't going to be bashing the hell out of the drums or taking them out of the house inside of a year, and hardware is a modular thing. You can replace it piecemeal as you decide you want beefier stuff.
-Skimp on toms and kick, and don't worry about the sizes. If you get good on drums you will become anal about drum size preference, and at that point you can get what you really want. Most of drumming is kick and snare and cymbals, and the beginner won't notice the difference in drum tone as much as they will notice the difference in head tone and how it's tuned. Even a crappy used CB700 kit is going to be useful for learning the drums and will sound adequate with a new set of heads with proper tuning.
-After you have a kit, spend the time/money going to a drum shop and learning how to tune properly.
-You are in trouble if there is a drumset in your basement and no earplugs to be found anywhere. A big complaint with drummers is the inability to play softly, and that's because playing softly isn't a beginner skill. Make sure you protect your ears while you are working on this skill!
Above all, remember that you're buying drums for a reason. If you get something crappy just for the sake of having a drumset, you'll just end up selling it later in frustration. Be mindful of what you can skimp on in the beginning and what can be upgraded, and try to buy with resale value in mind.
Oh, and feel free to PM me if you have any questions.