I agree with everything already posted.
Just remember one thing, you are new at this and some people have been autoxing for 30 or more years. You are NOT going to have the best times for the day or even in your class. The Tour is a very capable car, but experience will outrun money any day. I ran at a Porsche event and beat a guy in a GT-3. I was haveing a very good day and he was afraid to push his car.
Just go out and have fun!!!