How do you unlock all vocations on dragon quest nine

you have to do quests and then you'll unlock that vocation, however to use the vocation I suggest you make a new character then go to alltrades abbey because, you can't just make a new character with that new vocation.
Here is a list of where to find each new vocations quest.

1. Gladiator- there is a man down the stairs at the alltrades abbey that will give you a quest where you must defeat three slimes at 100 tension using the dragon slash ability.

2. Paladin- go to the top of the castle in Gleeba and there will be a small fountain, behind the fountain there is a woman, talk to her she will give you the quest to become a paladin, you must go into the desert and use the whipping boy ability 10 times.

3. Armamentalist- at alltrades abbey there will be a guy that kind of looks like a pirate talk to him and then he will tell you to defeat two metal slimes after using the wizard ward spell, or maybe it's an ability, I don't remember but the person who uses the wizard ward must be the one to kill metal slime, metal slimes can be found in the place where you defeat the ragin' contagion, but beware they are really hard to find.

4. Ranger- Go to the bottom of the heights of loneliness, which is the place where that you have to go to get to zere rocks. There is lady talk to her, she'll ask you to use the toxic dagger ability to envenomate three hocus chimearas (which are in the heights of loneliness), but the poison has to kill them.

5. Sage- Go to Gittingham Palace and go to the right then walk to the end of the hall walk through the door, after that walk up the stairs and talk to the bookshelf, after you open a book you find out it's actually a sage that was cursed into being a book for life, he'll tell you to kill five great trolls using the spell frizz.

6. Luminary- Go to the dancing club in Gleeba (after you beat the game) and by the backstage there will be a lady in a weird outfit, talk to her then you'll she tell you to beat 3 moai minstrels with hot lick (moai minstrels can be found in grottos)

Each new vocation requires either a specific vocation or weapon.