First race coming up, advice?

1.  Do you need a wetsuit?  As long as the water is warm enough go with your tri shorts for the swim and put the jersey on later if you want.  If it's a cycling jersey I'd take it off for the run. 

2.  In the next few weeks, try some different things before morning workouts and see what works.  It should be something you're used to.  Spreading it out helps it not sit in your stomach.  I Start with some whole grains and protein, then some fruit and finally (if your stomach can handle it) a gel with caffiene or a my favorite, Starbucks Espresso doubleshot.

For meals, try things out and find what works best for you.
Often, a high carb-meal about 12 hours before your race is what alot of people do. A good high carb meal, is Pasta with sauce, and bread, and lots of water!!
For the breakfast of, make sure you try it out before race day, nothing is worse than having a log in your stomach. What I eat on race day, about an hour before start is Oatmeal, and a banana, and water.
Also, for what you are going to wear, make sure you practice in it and feel comfortable in it.

Good luck.

Edit: Make sure you don't eat an apple before racing. Apples are runners worst nightmare. 

Dont eat anything solid after 5pm.  You want to digest everything and hopefully 12 hours will give you enough time to 'get rid of everything' before the race starts.   In the morning, I had a two eggs and a smoothie before I left my house, a clif bar when I got there and a gel 15 minutes before the race.

I didnt do anything too strenuous a couple days before, but did enough to keep my muscles active.  The day before my race, I just worked on my transitions.  That way I also knew I had everything I needed before I packed it up.

Practice your transitions!!!  Seriously.  Lay it out in the yard and practice.  Turn on the hose, get wet.  Run to the bike, put on shoes/helmet and ride around the block.  Come back, switch shoes and off on the run.  Do this until it feels automatic.  It really helps. 

And it gives your neighbors entertainment for the afternoon. 

Well, thank you all for the responses so far, I'll throw a little information out there to fill in some blanks. I'm pulling this together at the last minute more or less, I'm broke from a rough transition from my previous job, and school is starting up soon, etc. etc. so I'm  doing this on the bare minimum right now. The last released data about the water temperature is that it was 77 degrees, today though we got a downpour, so that may change. I don't own a wetsuit and won't have the money for one before this race, so all I have is tri shorts and a tri jersey. I'll be biking in my running shoes on platform pedals because I don't think I'll be able to get real pedals and shoes before then, and that is going to be really funny, because my friend is letting me borrow one of his bikes, it's a carbon fiber Trek with full Dura Ace, and I'm going to be racing it with platform pedals, looking like a totally gumbie  I know I should be better equipped, but I really just want to pull this off, I'll be better prepared for my next race, but with school starting back up I'm not sure when that might be, so yeah, I'm going to go out there half prepared and have a hell of a time, which is what this race is all about, there's live music and themed sections of the race, it's not a serious race anyways. As for what condition I'm in, I used to be a competitive swimmer, granted that was years ago, but it has come back to me fairly easily, and swimming 2000m isn't a huge deal for me. Biking on the other hand, well, that's my worst discipline right now, until I got the bug to try a triathlon, I hadn't seriously biked at all, biked all over when I was young, but nothing serious. I know I can do 16 miles on a bike with fairly good time, but I'm not sure about how I'll do on the run after that, and I haven't had alot of time to do any serious brick workouts, so I'll likely just take it easy on the bike as I know that I can do the 3 miles if I don't overexert myself.