If I spawn villagers in creative mode, will they build a village? Or do they even build anything?
No. Villages are created when the world is generated, or built by players. They are not built by villagers. You can build some houses yourself, and the villagers can recognize it as a village, but villagers cannot build anything themselves.
Villagers do not build anything, they are always idle (unless interacting with players).
If you build a village yourself, villagers will begin to breed, but only after the village meets certain criteria.
From the Minecraft Wiki:
protected by Community♦ Jul 16 at 1:36
Thank you for your interest in this question. Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.
Would you like to answer one of these unanswered questions instead?