Angelsboi, first - look forward to meeting you at GenCon. Drop by the Mystic Eye Games booth and say Hi.
Secondly, some advice.
GenCon is the most fun with friends. So, if you are going alone, plan on dragging some friends along. It's way more fun that way.
Actual organized games that you must pre-register for cost two tickets, (generally). Tickets are $1.50 apiece, unless they've gone up; that's what they were in the past. That's $3.00 per game. But that's for games that actually appear in the book, and unless you pre-register for them, most are full by the time the doors open, because everyone has signed up for them online.
My advice is to not worry about the games so much. You can play games anywhere; for me, the fun is in the seminars and events that you can only get at GenCon. Of course, you can always sign up for really obscure games that no one has ever heard of. Sometimes you find a gem, and other times, we'll let's just say that there's a reason no one has ever heard of them.
Like someone mentioned, everyone runs pick-up games, and I generally only play in pick-up games. These are games that people run for free, just because. You can even just yell out into the hallway "Gonna run a D&D game, come here if you want to play." I did that the first year, and ran a Planescape game with people I grabbed in the hallway.
Don't try to fill out your entire schedule with games and activities. Leave a lot of time open for doing nothing, and devote this time for exploring the booths, and exploring the cons. The vendor floor will suck up mucho time.
As for the vendor floor, the advice given has been good. I would scour the entire floor and take a look at everything that's available. You probably wouldn't want to rush into buying a bunch of stuff on day 1, seeing something later that you really wanted more, and then not being able to afford it, or worse, not having money to eat on. On the other hand, some things sell out, so if you wait too long, you might end up regretting that, too.
Basically, GenCon can be entirely overwhelming, but it's a blast, and I'm sure you'll enjoy it immensely.