you can put an aircon in a golf it is not too hard
firstly you need to get the compresor and the two radiators the inside one and the outside one you can get them from goldwagen or the scrapyards
then you need to get some aluminn pipes an special soldeersel for it
oh and then you need the gas you can get by the side of the road for 20 bucks
Ummm...condensor? Evaporator?