Tough one to answer. You need to work out how much the car is 'worth' to you and what is needed to 'restore' it. If you go for the full nut and bolt resto then you're unlikely to recoup your investment should you wish to sell the car. Start with one thing at a time - get a quote for the work it needs to pass the MoT and then either inspect the car yourself or take it to a local garage to get an idea of what problems it might face and how much they may cost to fix. The car is entering the point in its life where it is going to need some regular attention and investment. Racing Pumas are already collectable modern classics and there is a following for all Pumas, although it will take a few years yet before values start to rise.