Hi Glennette, in answer to your questions:
1) You can create job packs in JobRoller which allows you to set specific prices, duration, number of job listings etc within those packs. It would probably help if you look at the specific job packs screen on the
JobRoller admin demo so you can see exactly what it is you can set.
2) This can be tested out on the
JobRoller demo, simply type in a zip code and set the relevant radius from the dropdown options and you'll see the relevant results returned.
3) There is currently no coupon function built into JobRoller at this time, but is something we may be looking at for a future release.
I hope this information helps, thanks :)