If you want to keep the car, you'll need to prioritise what's important. Obviously, the safety ones are your top priority. But as far as the rest goes, one way to do that is to look objectively at what you use the car for and then tackle those problems first before moving on to some of the longer term issues. If the car does need major work, then you'll need to cost that up and see if it will add any value to the car compared to the price you'll get for selling it as spares or repair. These are at the bottom of their depreciation curve so their value is rock bottom and their need for parts is highest.