I assume this is in Easy survival? http://www.sandlotminecraft.com/index.php?threads/getting-started-in-easy.5122/
Creative. unless you are talking about SVS Or Easy. In the lobby, you dont get jobs. In easy survival, go to a certain building. i think its white. and pick a job.
In Easy survival, the jobs hall is to the right when you exit the spawn point main doors. You can select two jobs that pay you for doing things. In the Adventure Server, in Hogwarts, you can collect Knuts and such to buy items there. The other servers do not have jobs.