Vehicle service manual. I do all my own out of warranty work - saves a bundle. Even learning to do your own routine maintenance can save a bundle. If you have no mechanical experience at all, some schools offer beginners courses - well worth the money in the long run.
I never understood the mentality of buying a new vehicle because an old one is "going to start to cost money to repair" Properly maintained, and unless you have a complete lemon, even the higher mileage maintenance items won't cost as much as a car payment. The clutch, timing belt and blower motor I replaced last year on my 160,000km car (100,000 miles) might have been 3 months payments on a new car but that means the other 9 months payments are mine.