Rpg Maker Events

RPG Maker Events are how you set up certain features such as moving between screens, set up battles, talk to players and anything in between. But for each event there are all sorts of variables that you can access along side the main function you want to have such as an enemy giving you a certain amount of gold depending on if you defeat them or not. One easy example is setting up a town sprite on the world  map to change to the town map or a building on the town map to enter a building. You press F6 to enter event mode then right click to do your business:

Afterwords  you choose the option transfer and set the starting position of the town map and everything should transfer over when you switch to playing.