Think about it this way - you don't want to start making the car looking pretty, until you've done the dirty work. Dropped wrenches, banged hammers, and dirty clothing crawling all around your vehicle are going to be a sign of restoration.
I'd say, make a list of everything that needs to be done. This way, you dont put something back together to find later that you are taking it apart for another project.
Usually you want to get the car restored mechanically first, get the brakes working, the car running, and all the lines, hoses, belts, wires, etc. all fixed and perfected.
From there, you'll want to move onto the other restoration, interior heater components, wiring, lighting, etc. etc. Once you've done the brute work, you'll probably want to start making it pretty from the inside out.
Goodluck!
-Brad