Hey, if she doesn't want it can I have it?
Just wait until she figures out how much stuff you can cram into a PT cruiser!! My mom went antiquing with a friend in my dad's PT Cruiser - she put all their stuff PLUS a truly massive dresser in it and still had room to buy a table!
Be careful - they don't look like teen cars so she will be less likely to get pulled over unless she drives recklessly. I had a similar car - Ford Fairmont station Wagon - in hs and was the ONLY kid who could haul around a keg with-o getting pulled over. With a blanket over it I never got a second look from the cops. Kids in vans did, and in trucks. But not me - and the cops knew that I sold beer at work! WHile I didn't drink I did make some extra $$ delivering kegs for parties once or twice a year. My parents only found out after I had kids because I told them, lol. I was the GOOD kid who almost NEVER got into trouble. ALL of my friends' parents loved me and if they were with me they could stay out later and go places that they couldn't alone or with other kids. LOLOL!!
She needs to be grateful that she HAS a car. I had to drive my mom's and if I wanted the car I had to do the errands - most of them - as part of my payment for using the car. Plus pay for gas, etc...
Make her walk or bum a ride to her activities, ride the bus to school, etc... until she can be properly appreciative for the vehicle, the insurance, the gas and maintenance, and the generosity of her parents. Keep the keys locked away until she EARNS the right to drive a car with her behavior and choices.
If that means that she has to drop an activity, well, it is her CHOICE. If it means she has to bum rides or walk, well, again, her CHOICE. Driving is a privilege and having a car is a HUGE privilege - it is NOT NOT NOT something she is ENTITLED to, regardless of what her friends have. If she decides she really NEEDS a car and that the one you bought will NOT do, let her get a job and earn the $$ to buy one (and make her put it in your name until she is 18!). Also let her WALK to work.
I hope she learns to be appreciative fairly soon.
Reading "Parenting Your Teens with love and Logic" would be really helpful to you, in my opinion. They have awsome ways to handle teens and their behaviors - and they are effective and fairly easy on the parents!