Yes.
In some states, YES. email me if you need more info.
I'm not in California but I'm guessing you will need at least, a business license, and a tow vehicle license for hauling vehicle's. Check with the Dept. of Licensing and the California Highway Patrol. Both have websites that will likely help you with your question.
Yes you need one to Operate any type of Vehicle in California!
You have to posses the title on the vehicle and the documentation that there is a default in payments.
YOU HAVE TO REGISTER YOUR BUSINESS WITH THE STATE
No, you dont even need keys to repossess a car in South Carolina
Yes you do. If you get caught driving without a license you will be cited and the vehicle you are driving will be impounded for 30 days.
You can repo your own car but you cant start a business without a license.
You need to call the police in ANY state ASAP after repoing a vehicle.
No, all you need to have is legal status in the u.s. And a ssn.
If it is under 50cc you do not need a license in California.
Most, but not all insurance companies will require you have a drivers license to buy liability insurance for your vehicle. All of the 50 United States however require you have a license or permit of some type before you can drive your vehicle on public roads.