You should read all stickies before posting. That's what I did. I'd also suggest changing your signature, it's a little annoying to look at and takes up a lot of space.
A couple of scripts I can recommend are modern algebra's Quest Log script (which can be found in the scripts section), Omegas7's Quest System (which can also be found in the scripts list), or Sky00Valentine's Quest System (you'll have to google for this). I have used all 3 and they're all great. It'll depend on what you need the "jobs" scene to look like and other basic functions.
You could also probably create "jobs" like in fable 3 by eventing. Simply have an NPC that transports the player to a map where they would perform that job. Then you can give rewards based on conditions. The actual minigames themselves might be a little hard to make depending on what kind of games you want, but there are a ton of event-based minigames that you can create (there is a forum section that has all of these).
Hope this helps.