Neuspeed quickshift kit - sure, do it.
Coilovers - You'd be better off going for Bilstein B8 struts and Eibach springs or similar, unless you're going to corner-weight it.
Poly bushes all round - replace with OEM. They'll last better and things will work as they should.
Grooved and drilled disks all round - waste of time - just fit OEM (not 'value' - proper branded discs)
green or red stuff pads all round - OEM again, or anything that's not EBC
braided brake lines - only do this if you're replacing all 4/6 (can't remember which it is) or don't bother
panel filter with modded standard air box - just replace the filter every 6k miles instead
4 good tyres on refurbished standard wheels - find the lightest wheels you can - this will make a significant difference to the feel of the car.
Strut brace - pointless tat unless the footplates on the strut tops are welded down.
Fit a CG lock to both 3-point belts. This will hold you in your seat a lot better.
http://www.cg-lock.co.uk/Remove all unnecessary interior trim and the sound deadening on the floor/roof/anywhere else you find it. This will give you a bigger performance improvement than all of the things you listed.
Replace the thermostat, stat housing (while you're down there) and the radiator. Track work makes cars sweat and you don't want to dump your coolant on a track, it will make you deeply unpopular.
When was the cambelt last done? If unknown, replace it.
Change oil, oil filter, fuel filter, leads, cap and rotor arm (go to VW for the last three items). This will pep things up significantly.
A tubular manifold will significantly improve the breathing of the engine. Fit one.
As for the 'ring: either find an insurer with no exclusion clauses, or book on a track day out there - much safer and way lower liabilities. If the car is well-prepped and you share it between 2-3 people you can knock out +20 laps in a day - this makes TF laps at 20ish Euros a pop cost the same as a £400 track day.... you just do all the laps in one day instead of spreading them over 2-3 days. You can also get video on track days, whereas videoing is banned on TF.
HTHs.
