I know Justin was concerned about this when they 1st came out, but I am not 100% sure. I want to say yes, but it can very well be no.
Yes, but pretty hard to make on EMC due to alot of issues. Only two people have made efficient onces so far. One of them is currently selling it for 450.000-550.000 rupees. its a 9spawner with autokill and a doubleslimefarm besides it.
I remember reading up somwhere from a post by ICC or Justinguy that they are disabled in town, but i'm sure there is nothing wrong with attempting to make one in the wild , go for it.
They're disabled now. They didn't used to be. You kept the golems/metal squidwards from before they were blocked.
On your res in town, can you not BUILD iron golems and snowmen? You can place villagers and golems but they will not breed. This was disabled due to a bug that allowed unlimited villager breeding. The bug has been fixed that I know of, but I am unsure of why breeding is still disabled.