Minecraft Villager problems in Tynker

If I play the Tynker Server in Minecraft, and I download a Villager skin, like a pre-1.14 butcher, will its UI be changed back into pre-1.14 and cause problems? Now in 1.14, all the villagers won’t have a profession until they come to a workstation. Before, I think it is because they spawn in rooms, appropriately, like blacksmith houses. The villager
What I’m saying is, that if I choose a different skin other than the no profession brown-clothed villager or a nitwit villiger, will the texture pack work and actually add these textures?
(Also, does the Tynker Server support 1.13+? A lot of other things like mods (RL craft) only exist before 1.13)