http://www.ft86club.com/forums/showthread.php?t=25485
Good instructors will be the most useful thing first time. If you're comfortable hitting the ABS under braking then you will overheat the stock pads/fluid. If not you can probably get away with going 100% stock the first time (everything else in the car is up to the task except the brakes for intermediate and up drivers) and at the end of the day you may start feeling the limits of the brakes and tires, imo an experience worth having to realize that all equipment has limits.
Thunder Hill is a good first time track (be prepared to watch V8's haul away in the long straights and catch them up slowly over the rest of the course, the real joy of a momentum car like ours), watch some videos before you go so you don't get lost out there.
The group you go with will have details on what's needed, they want you to show up and have a good time, email them with questions.