What is the name of an 80s TV movie where a man acquires endurance powers and quick self-healing ability after a crash with a vehicle containing radioactive material?
I think you are referring to I-Man, a television pilot for a series that was not picked up, starring Scott Bakula as the title character and Joey Cramer who went on to star in Flight of the Navigator. The pilot was shown as a Disney Sunday Movie in 1986.
In it, Scott Bakula plays a cab driver in Houston. While driving his son, they come across a NASA van that was in a crash containing an alien gas. The father and son run over to assist the driver of the van, and inhale the gas. The van explodes, but they quickly find out that they both have regenerative powers. They also have great endurance. A government agency recruits him to work for them.