One thing to consider is that the tires are going to wear out. Tires typically cost around $100 each, though it really depends what type of vehicle you own. For a small coupe, you could find deals for $60 a tire, while finding them for $100 each would be a deal for a truck. Either way, to make your vehicle safe to drive, especially in the rain or in the winter, you need to replace your tires every five years or so. It is also a good idea to buy a full-size spare so that you have it on hand in case you get a flat.
Another thing to think about is just the cost of standard maintenance. You need to do things like replacing the washer fluid, adding more coolant and changing the oil. These things do not cost much, but they have to be done a few times a year so that the car does not break down. You also may need to have the tires rotated or aligned, helping them to wear evenly while you drive.