I'd not try and put anyone off buying one of these cars as the grin factor outways the possible running costs.
I've had my 197 five and a half years and it's just 8 years old, I suppose most of this could be classed as wear and tear but I do a fair few track days so stuff can wear out quicker plus I use sticky tyres and have a full vibratechnics set up.
It's done less than 70k miles but I've replaced rear discs 3 times but all three times for the bearings not worn out discs, the dealer put cheap discs on before I bought it (30k miles) but each time I've done it I've used genuine Renault discs. I've replaced both front bearings (1 either side) and over xmas I replaced both bottom ball joints, 1 was worn 1 was soon to be ready.
I have a broken front spring at the moment that I'm just in the process of sorting out but this is the 3rd spring I've broken, 2nd on the passenger side, to be fair each time I've replaced them (cup type) with second hand ones so they could all have been the same age/mileage but they are prone for it. I had a rear damper replaced under warranty also.
I had a gearbox at 50k and just before that the flexis broke on the manifold so that was replaced with a toyosports.
Sounds like quite a list put like this but I've enjoyed my time with it and have no intention of replacing yet or for a while.