How can I report someone driving without car insurance?

My mom was showing me how to change my car’s oil and told me I let it get too dirty. How does engine oil get dirty? Is it bad when it does?

I was recently in a hit and run that damaged my car. The damages didn’t seem extensive, but when I took my car to the repair shop they said it could take three weeks to fix my car. One month later, my car still isn’t ready to be picked up. How long should it take to fix a car?

What’s the best way to pay off a car in one year? I recently bought a car. I was able to get a 36-month loan, but I want to pay it off before my daughter goes to medical school next year since I'll be operating on a pretty tight budget. Plus, I'd like to avoid as much interest as possible.