CLOWNS
As far as I can tell, the clowns came only with 2 sets, the Clown Car, and the Circus Train. Of course, it's likely that they came in a seperate package, one of those blister packs, as well, but who can say for sure? 
The little fellow on the right with the orange body and pointy yellow hat was the clown that came with the circus train, but he also came with the clown car I purchased. He's the clown I run into the most often. 
The long blue fellow to the left with the enormous necktie is about twice as tall as any other clown, which makes him just the right height to drive to clown car. I'm sorry I don't have a picture of that set up yet, 
hope I'll have one soon! It may be difficult to tell in the picture, but the other orange guy on the right looks just like a cowboy, except for his head of course, which has the exact same face as the circus train clown, sorry for the profile shot. Then we have the green guy on the left, who doesn't look like ANY other Little Person, and finallly the fireman clown, 
using the same hat and body as many other firemen, but no arms. If anyone knows of any other sets that the clowns may have come with, or other clowns styles I don't have listed here, please feel free to let me know about them.