[Help]Instances

[Napster321]

I want to learn how can i make a player to teleport/enter in instance kill some mobs and when he finish to spawn an npc that will make him exit the instance....generally i want to see how instances work...i checked in data/instance but only spawnlists.....also i checked in scripts/instance but i cannot understand much things and also i cant understand if these 2 folders are connected scripts/instances - data/instances