There is a how-to on the smax owners club site on how to service the bonet release so it doesn't fail. Mine is a 2006 car but still is on it's orginal bonnet cable.
Tyres - I buy part-worns and they are much cheaper. The rears still look fairly new after 30,000 miles but as brand new fronts cost £150 each and last only about 15,000 miles, I buy good part worns at about £60 each and they last 12,000 miles.
The exhaust is a common issue on the TDCi - my petrol still has it's original exhaust 7 years on and looks very structurally sound.
The badges are a common issue - most go for a gel overlay rather than replacement.