Wow gold desire is just like the money desire in the real world. Loads of gold are hiding under the ground waiting to be found, from killing things to finding it, but the easiest way is just to buy it. While everyone is playing the game for fun, and so there will be little opportunity available, you might be able to find someone willing to pay you to protect them on a difficult quest although this does require you are already fairly advanced.
In World of Warcraft, Many of the creatures will drop gold or items for you to loot, you can either sell this to a vendor somewhere else in the game, or use it yourself to make it easier and faster to kill things, thus getting you yet more gold or items. However, killing things can be hard work, and if you don't want to spend a large amount of time working to gain gold then you need to find some other way to get it. If you don't want to work so hard for your gold, then your only other option is really to have someone give it to you. No-one is going to just hand you over a pile of gold, however, you could work as a merchant and buy and sell items for profit. This can be done either by going from player to player, or through an auction house.