Those costs are highly variable and can be very low. I have 30+ years owning and operating automobiles in the USA, so I can speak from a well of experience on the topic.

If your car is running OK, able to operate well enough to travel in, your only cost could be gas. Some of us have cars that are paid off and low-maintenance. Insurance is required by some states, but you don't technically need it to operate the vehicle. You can also get low-cost liability-only insurance to meet the bare minimum legal requirements. Routine maintenance can be cheap if all you do is change the oil and filter - this can cost $30 or less every 5000-10000 miles if you do it yourself.

But if you're a dumbass who bought a monster truck with long financing and high payments, you're gonna have a bad time.