Yes, do the timing belt ASAP if there is no proof of it, luckily dead easy on these engines. The courtesy light is operated by the actual latch in the door, there may be a connection off. I would remove the door panel and check that first if the light works from other doors. However the individual door modules are a not uncommon fault, found in the center of the door and about £80 from the dealer I think, or of course a used one.

As for the heater lights, pull off the fan speed knob, there is a bulb in there that lights the whole lot if I recall correctly, its pretty small but you can get them from Halfords or similar and although fiddly, easy to change.

Rear wiper could be a few things although its most likely water from the washer system has ruined the electric motor by leaking on it. Although try the usual suspects, fuses, testing for 12v at the motor etc.

Edited by countryroads on 06/02/2013 at 13:32