One of the major costs for car owners on this side of the pond [and i suspect that side too], is maintenance. This exceeds insurance in some cases. If you buy an older car, you not only save money on the purchase price, but on insurance too. This is particularly true if you only carry liability, and a low (or no) collision coverage. Insurance companies will only pay the 'salvage' value for a vehicle if it is totaled, and for a 10 or 12 year old vehicle, the premium for that coverage will total up to the salvage value in 5 to 7 years. If you have a loan on the vehicle, the lender will require you to carry collision, because they want to get their money back. If you buy the car outright, or with a personal loan (from your 'rents say), you can skip collision coverage.
It is a fallacy to think that new cars are 'trouble free'. Usually, there are a flurry of problems with 'new' anythings. Then, as the assembly, wiring, and other problems are fixed, there is a 'honeymoon' period of 5 to 10 years with few problems. Then you enter the 'wear out' stage, when various things begin to reach the end of their useful lives. For many vehicles, the basic structure is good for 200,000 miles or more. Used and rebuilt parts are readily available for most vehicles. On most repairs, the labour amounts to half to 2/3 of the repair cost. Take an 'adult education' course in auto repair. Many 'high schools' in the states (or the equivalent where you live) run these, under the guise of 'teaching the unemployable' a skill. I have taken several of these, and most of the 'students' were employed professionals [engineers, dentists, one solicitor], who wanted to get into fixing their own cars. The cost was minimal [under a quid an hour for a lighted, heated shop, with a qualified instructor]. Best of luck! Cheers.