I can't remember exactly what sizes you'd need, but it's:
Springs compressors for the top mounts off the old kit
Spanner for the nuts on top of all four struts
Allen key for the front too struts at the top (it's a weird size, maybe 7mm?)
Wrench for the 3 bolts per strut up front on top
Spanner to de-attach the strut at the bottom where they meet to bottom arms (there's two here)
Spanner to de-attach the rear struts at the bottom (one screw each)
The nearside rear (if a GTi) will get caught on teh backbox, so you may need tool to dismount this so you can gain access to it.
Sorry I can't provide any spanner sizes, but at least you know what your up against.
Look at this guide, it's for a 6N but works in the same way. Maybe you can work out the nut sizes from the pics?:
http://www.tigerstyle.co.uk/poloforum/v ... =coilovers