it would mostly be easy fixes ,as for the license plate light it could be where the parkers feed is joined for it ,it could be scotch locked or it could have a bad earth ,and the interior light wont have an auto on setting cos i dont think 1200s came out with an auto on and it can be done by adding the little pressure switch in the door ,and then running it to the light ,but most things on your list can be easily fixed with a test light and a soldering iron

good luck