Taxes is a default job. It should auto-add you to it when you join the server unless you have mcjobs.admin.leavedefault or are a OP on the server. Pay_spawners tells the mod whether to pay you if you're near a mob spawner or not. If you do just /jobs that's all it'll show. You need to use /jobs list The download link is on the bukkitdev website. Do you have usePerms set to true?