If I understood you correctly, put the objects you want in a family and make "Village" a variable for that family. After that use System->Pick Random Instance
EDIT:
Just noticed you don't have a license for the full version so I think you can't use families. In this case, try something like this:
Local number = x
Set Local number to round(random(x))
Local number= 0
System-> Pick Random Instance (object 1)
Local number= 1
System-> Pick Random Instance (object 2)
Local number=2
System-> Pick Random Instance (object 3)