Your scenario is rather unrealistic in that any auto (at least any in my possession) always has an assortment of tools, including some that are specifically designed to effect routine maintenance and emergency repairs and deal with the predictable raoadside hazards.
The scenario specifically includes whatever tools the manufacturer of the car provides with a new vehicle.
The scenario specifies it is not your vehicle.
This is a thought experiment to learn from each other what might be scavenged. Wrecked and abandoned vehicles as a class tend to be common enough, even in some remote areas, to be fair game for this type of consideration.