Unlockable Jobs
     This is how to unlock specific jobs:

Alchemist: Master Magician and Thief
Acrobat: Get a Casino Ticket
Cleric: Master 1 of the Starter Jobs
Ninja: Master Warrior and Thief
Monk: Master Priest
Spellsword: Master Warrior and Magician


Gallery Mode
     After completing any game mode once, you'll be asked to save your
game.  After  saving the game, the Gallery will be selectable from the
title  screen.  The  Gallery  is the same as the one viewable during a
game,  containing  data  on  all  equipment/classes/monsters/etc. that
players have found during the game.