Gasoline cars have been around since the automobile was invented by the Daimler Benz corporation, and that is where we sit today because we have gas stations one very corner, and you often plan your life around where the gas station is. You know that you have to be able to reach the gas station so that you can fuel your vehicle, and it works by combusting the gas in the tank to fire the engine.
You either have carburetors or fuel injection that will ignite the fuel, and that fuel will be used to push the valves in the cylinders. You can use diesel if you have an engine that is made in that style, or you can use unleaded which is what most cars are. Unleaded engines do not last as long as diesel, and they have to serviced a lot more. However, unleaded fuel is better for the environment when it is burned off. That is why some people do not get a diesel even if it is more economical. You can still find diesel family cars, but they are harder to come by. Also, the prices of diesel fuel change a lot because they are based more on the trucking industry than they are on the price of the gas that normal consumers buy. Drivers training schools use them to save money, and drivers education explains how the engines work.
You also have to be sure that you have considered how much fuel economy a gasoline car will get because they are all different. Some of them get very bad economy, and others get very good economy. You have to make sure that you know which kind you are getting because that will always determine how much you are going to spend on fuel on this car. Some people just do not realize how much they will be spending, and they get caught off guard when they do drivers training in it for a while.