Recently purchased Thai car off a family member cheap because of the problems it had. The first being no indicators or hazards so went to a local vw scrap yard and picked up a new relay for £10 and sorted that. :-) now I have 2 problems left

First one being irratic idling this is very embarrassing can be at traffic lights and it will rev up to about 1400 then down to 300 and level out or just keep going then cut out. Had a look on google and there's so many suggestions I don't know where to start.

Second problem is the drivers door doesn't work with central locking from the key, or the lock button on the door or door popper just manually with the key. The window works and red led still flashes. Any help with this will be greatly appreciated thanks in advance

Anyone?