The villagers that spawns from Villager Spawner they made for Emerald farm, they aint take job, there only 1 way to make them takes job, bring a zombie and let him infect the villager than throw weakness splash potion in zombie villager infected by the zombie and right clck on him with a Golden Apple, after 4 minutes its will back to a villager which its takes job.
there another way but need Safarines with uses, go to /rtp and find a village and take all villagers, or make a villager farm you can check them on youtube