It's $35 for non-SCCA members if you don't pre-register. Cooper stadium is directly off I-70 just west of downtown columbus. Coming from the east side you simply take I-70 west to the Mound St. exit, at the bottom of the ramp you're staring at the parking lot.
Ricochet, people autox cars that are heavier with less power than yours. It's all about having fun.
Racing usually starts around 9:30 to 10am. It costs nothing to watch or get ridealongs. If you are racing you are expected to work, you'll work 1 heat and probably chase cones after people like me hit them and place them back. We all have to work otherwise there'd be no cones left to drive through, it can be fun working though watching the other cars driving and also getting to see how other people take the course.