Don't bother with the car in a car fire - protect exposures (houses and such) you can't really save a car that has fully ignited. If you can put it out in the first few SECONDS of fire, you might save it. Once the fire is in the passenger compartment - it's over.
Have to second this one.
Unless it might be a collectable, or have a loan against it and you forgot to pay the insurance bill this month LET IT GO.
There is not much worse than a car that has been repaired after a fire or flood. Well, except the burn ward.