How you go depends on what you're trying to accomplish, what's there now, and how much time and money you want to invest.
Minor damage can often be fixed up with some glue and a few screws and be as good as it was before the damage. If the door frame is badly damaged, but the door is OK and only the latch side is busted up, then my method gets you back to where you were and is very cheap. It takes sometime though, and if you're paying someone to do it, it may not make sense.
Prehung exterior doors will take about as long to install as the repair I suggested, but may give a more secure result if a wood frame is replaced with a steel one. Prehung door are easier to install than doing it from scratch, but aren't trivial. Getting everything level and plumb takes time and care. The test of a properly installed door is that you can open it at about 45 degrees and it will just set there. Neither close nor open further on its own. And, that you can give it a light push and it will close complete and easily.
If this is a rental, ask yourself if a new $450 door, plus installation will earn you more rent than $20 in materials and an hour or two of your time. When I do this repair, or even just install new locks, I do always be sure to use long screws that reach all the way back into the 2x framing. Not as secure as steel plates, but better than a few 3/4" screws just into the frame. Keep in mind that if someone's determined to get in a brick through a window is a lot easier than breaking down a door.