i thought the name sounded familiar, i grabbed this the other day. haven't played it yet but i found this on the romhacking.net page:
"A new system to learn abilities is implemented, similarly to the original Final Fantasy Tactics the units will earn JP which they can spend directly on purchasing abilities. This is the only way the player has to teach new abilities to the monsters."
i would say go into the stats menu for a monster character and check for anything related to jobs or abilities. sorry for not having much more info or help than that at the moment.