My quick optimistic calculations suggest you will need the following:
New skirts (£50?), mirrors (£50), spoiler (£100), wheels + tyres (£300+), exhaust (£100), lights (£50).
Spray to match skirts, bumper, mirrors - £2-400 depending on job ?
That's approximately a grand and you're left with potentially an undetermined extent crash/repaired 1.2 Clio ?!
Ignoring the fact the mods (I'm assuming you're driving this currently, not doing the work then driving it?) will have put your insurance up a few hundred too, on top of the purchasing price, puts this somewhere in the region of a colour matched non-barryboy'd up car.
I'm not trying to sound like a twunt or make you look like one, but there are the fact as I see them.
If you're doing all the work yourself then great, but you don't appear to be suggesting that either.
Good luck anyway !