How do you change the oil in a Volkswagen Golf?

Loosen the oil drain plug on the bottom of the oil pan, and let the oil drain into a container. Then remove and replace the oil filter on the engine. Replace the drain plug, put in the appropriate amount of fresh oil and you're good to go. But if you don't know how to do this at all, I wouldn't recommend trying it for yourself. Any shop will do the job reasonably cheaply. If you do it yourself, make sure to dispose of the used oil properly!