There are dozens of light bulbs on your vehicle, illuminating everything to the road in front to the license plate in the rear, and for all of the modern technologies given us, most automotive bulbs are essentially the same as on out grandfather's car. So, it's no wonder why burnt out auto light bulbs are the number one cause of lighting failure.
Unlike your household light bulbs, car and truck bulbs do not unscrew. you generally either pull them straight out of the bulb holder, unclip them, or gently push them n, rotate them a quarter turn counterclockwise and then pull them out.
This vehicle video tutorial will tell you all about these auto light bulbs and how to change them in yourself, without paying ridiculous amounts of money for a mechanic.