2002 Toyota Camry engine problems

I was sitting at a red light waiting to turn left. I suddenly heard my engine rev and looked at the dash. The rpm's were all the way over to the right. My car lurched forward, hard, and hit a lincoln navigator in front of me. I pressed the brake as hard as I could, with both feet, to try and stop, but ultimately had to turn the car off to stop it from moving forward. I am now waiting for an investigation, which they have told me could take up to 30 days.

Car was filled with gas on return trip and while in traffic suddenly began to decelerate with no warning. The car was pulled over and stopped. Samaritans stopped to support stranded car and when they tried to turn the car on , it would not turn over. When checked by a individual who identified himself as a mechanic, he said, he didn't understand the problem. It was clear that there was oil in the car and it was clean.