For the clutch, the bottom line is that you are going to have to pull that side cover off and take a look inside. My guess, from your description, is that the belt is worn out which is not that big a deal if you have got 3 good years out of it. The parts are not too expensive.
For the headlights, the factory battery is a BS-9. The BS-12 is the next size up and will give you what you need to be able to run your lights. It may be time for a new battery anyways.
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