The headlights is probably the dim dip resistor, its a silver canister normally on the passenger side wing, usually up under the lip by the fuse/relay box. looks like this


For both of the windows to be not working i'd say it was a supply problem so check the fuses/relays and remove the switches and check there is a supply to them. Could also be an earth problem. or there is the possibility it could be the motors. Worst case scenario is fit some later phase rear window mechanism if you can find some (I would imagine they are easier to find than phase 1 ones).

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When I've got time I forget what I wanted to do, and when I remember what I wanted to do, I have no time!