Original tires
How many miles are on that bike Sandy? Like Paul said,you need good tires and most tracks have vendors there at the track. But I wouldn't want to be riding on the road w/o good tires either, Are they dry rotted,(have little cracks)? I just picked up a new Conti Road Attack 2 for my Bandit. I have different tires I use for track only, but they would be fine for a track day as well and give decent life on the road. All brands have different compounds, the softer the tire the shorter the life. Tires today are so good you can good grip from a Sport/tour tire and get a little more life than a pure sport tire. I get about 3K out of a rear tire on the road. I like to change them as a pair but I can use the front a little longer until I have more $.
Other than that,make sure your throttle snaps back,brakes are good,
no anti-freeze in your bike so you don't have to worry about that. Go over your bike and make sure all fasteners are tight and secure. Good chain and sprockets (no tight spots,and adjusted properly) remove your head lamp fuses and tape over the glass (blue painters tape doesn't leave glue behind) remove or tape over signals. And we have them tape over their speed-o too. Bring a cooler and plenty of water to drink, I bring my own lunch,but check and see if food is available at the track. Good helmet,boots that go over the ankles,gloves,either 1 pc. leather or 2 pc. that zips together.Check with the track day ,Moto Series rents Vanson leathers, I think its $50. for the day.Gym shorts,extra dry clothes (you might work up a sweat) for the way home. A good nights sleep the day before. That's about it.
Dan