Clubs??
Yard sales, yard sales, yard sales.
Specifically, go to nicer neighborhoods where you're prone to find golfers living. I picked up a Taylor Made 360ti driver in excellent shape for $5 a few weeks ago. Craigslist is another place to look.
Before you go any further invest in lessons. The golf swing is absolutely what the game is about and getting good swing habits started early will really help your game along as well as making it more enjoyable.
Also understand that while crushing a long drive is nice, it's the short game and your proficiency at it, that really helps shave the strokes off the final score. That and putting. You don't have to always play full sized golf courses to sharpen that part of your game. Try playing some par 3 courses, the St Louis area has several.
Yes, the game is addictive. I've literally given up fishing the past year and taken the game up again. I used to be pretty good, an 8 handicapper at one time. That was 25 years ago. I really love the swing mechanics of the game and understanding that part. I will say that the 25 years of aging has made the game a little more challenging than it was. If I had some of this equipment back then, especially the drivers, I'd have been crushing 300+ yd drives all the time.
Enjoy.
That's what I've been trying to do around here at school, but have only found a set of crappy Rams. I've played with Rams before and just didnt like them. Where at in St. Louis do you go to these garage sales?!?! Sounds like you got a steal!!