The rough idle could be two things. You said your idle is between 500 and 600. It should be up around 750. There is an adjustment you can make to raise the idle speed. Its on the passenger side of the injection pump. Between the pump and the block. You'll need a 14mm deep socket to loosen the lock nut, then there is a screw on the top that you can adjust the idle speed with. Then retighten the lock nut. The second option is the rack damper bolt. It may need some adjusting. Or may need to be replaced. I would raise the idle first and see what happens.

Your quick 1-2-3 shifts are caused by an improperly adjusted bowden cable as you said. I can't remember which way is needs to be adjusted, but I think you need to screw the adjusting screw out to make the shifts later. Turn it a 1/4 turn or so at a time then drive the car. And keep adjusting until the shift points are a little to your liking.

Sounds like your head light issue could be in the combination switch you use for turn signals and brights. I had one once that would turn the lights off when you turned the signal for a right turn. I would play with that a little, try turning the lights on then try switching to brights slowly and see if the lights cut out.

Depending on the year the cruise could the a vac problem or a cruise amp problem. It's really rare that cruise works on these cars.

The door lock issues are vacuum related. You probably have a leaky actuator in one of your doors, a bad connector, or the pump isn't pumping enough. Like stated before you'll want a mity vac to troubleshoot the vac system.

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