Wipers is £20 max to fix
Headlights too low - ensure your set to 0 on adjustment on the dash, checking then they move fully up and down
Then adjust @ 0 to correct height
CV boots - is it insecure? leaking grease? Insecure can be resecured with cable ties or a new metal clamp, both cheap £5 max
As for emissions
A service - Oil, oil filter, Plugs, HT's, Air filter and then a tank of posh petrol
Then go and give it a drive like its been stolen to get it hot and get it flushing the crap out the system
Also ensure you give them the car when the car is smoking hot, hotter it goes in, the better the emissions should be vs Cold