Since whole bike seems dead...i.e. you should at least have the headlight, guage lights and turn signals functioning as a minimum. I would disconnect the battery and have it checked with a load tester.
You need to find out why everything is dead FIRST, before worrying about the starter/drive and other problems that may have occurred.
You need to find out why everything is dead FIRST, before worrying about the starter/drive and other problems that may have occurred.