does the episode you have the captures from have a name. if so, the episode number probably could be found on imdb.

Looks like a 1962 to me, and appears to be a coupe, so Regal?

Wilbur's car is a Studebaker Lark, but I'll have to check on the year.

A horse is horse unles of course the horse is the famous Mister Ed!
I only have two episodes, and cars are only in one,

unknown, I believe this car belongs to Wilbur Post, so two stars (only one in this episode, but I think it is used more) more images available

Street scene, all one star, pic any

imageschack was down, so used tinypic