1) Pads as said before are pretty cheap
2) You need to find out why this isnt working. If its a bulb, nice cheap and easy fit. If its the lamp housing gone wrong - that will set you back over £100 from a dealer (I know, mine went under warrenty!)
3) Not sure what they mean by windshield wiper and washer switch. Its a stalk on the steering column, and if thats broken, it wont be cheap to fix.
I would get some clarification on points 2+3 if you go to see it, and if either are broken, unless its an amazing deal, just walk away. There are plenty of good Zeds out there at knock down prices.