It's easy.

Did the car start? If yes, drive it. If no, take (tow) it to get fixed.

Is the car making funny noises or is some form of warning light popping up? If no, drive it. If yes, take it to get fixed.

Does the car need an inspection? If no, drive it. If yes, take it to get inspected.

Is the car due for an oil change? If no, drive it. If yes, take it somewhere to get the oil changed.