Assuming you are referring to the cost of fixing a problem with a car, it is difficult to give an estimate without knowing the specific problem. Generally speaking, however, most car repairs will fall into one of three categories: Minor repairs, major repairs, and engine/transmission repairs.
Minor repairs include things like replacing a headlight, changing the oil, or fixing a flat tire. These types of repairs are typically fairly inexpensive, with many only costing a few hundred dollars. Major repairs can be more costly, especially if they require parts that need to be ordered or special tools that need to be rented or purchased. Engine and transmission problems are usually the most expensive to fix, as they often require extensive work and can involve pricey parts.
The best way to get an accurate estimate for repairing your specific problem is to take your car to a reputable mechanic and have them diagnose the issue. They will then be able to give you a better idea of what needs to be done and how much it will cost.