If it is a car off of a car lot, your dad should have a fleet policy card. Take that and explain to the court that you were "test" driving the car because it had recently had some repairs. Unless you are "test" driving a car, it should have a dealer plate on it. I get pulled over all the time driving on a drive out tag from my lot and I tell the cop I'm "test" driving it and show them my fleet insurance card that covers all the vehicles. As for running the light, you're on your own.