I was in a car accident no one hurt.By law am I allowed to get more than 1 estimate ?
You can get as many as you want. There is no law that addresses the number of estimates you can get. Insurance companies usually as for 2-3, and usually take the cheapest one! Made sure you have them check for possible hidden damage!
Yes you are able to get a more then 1
Sure you can sue anyone, but guarantee you that, you will only win on who owns that car, suing the passenger? unless proven to be apart of the crash I would find it difficult to win that case.