Welcome across to OZRS from another former Aussiefrogger and 205 GTi owner, and congrats on the purchase!
I jumped ship and bought my Titanium 182 Cup almost 10 years ago and am still enjoying every drive in it
As mentioned above, a quick pull (or push) on the driver's side window button should have it go up (or down) with one touch.
For the steering wheel - the Australian sun is not kind to them - I guess you could try cleaning and treating the leather (not sure if it really is leather...). Mine really needs to be re-covered.
I'm still on my original exhaust - haven't looked recently for any corrosion, and my car is almost at 160,000 km now. Haven't really heard of issues with corrosion.
I had my clutch replaced last year as the pressure plate was going (was very stiff to operate), and Julian from RenoTech recommended I replace it to avoid another part in the clutch linkage (can't remember what exactly, but apparently no longer available new) from failing due to the extra strain. The clutch itself still had plenty of material and was in great condition otherwise - but I guess that depends on the operator.