I have no idea how to make a NPC either I have been searching for the script but I can never find it neither can I figure out how to make them speak
All you need to do is make a model that looks like a person, insert "Humanoid" in the head, and insert Dialog into the head.
make a character name bodyparts things and head Head put a dialog in there and place a dialog choise in theredsfjidsfidhs;fklsnd