Back in the 1950's, most of the cartoons on television were ones that had been shown in movie theaters in earlier years. Here is one, made in 1935. I saw plenty of old Betty Boop cartoons on TV in the 50's.
We had shows like Mr. Wizard, Howdy Doody, Captain Kangaroo, The Little Rascals, The Atom Ant & Secret Squirrel Show, The Mickey Mouse Club, The Archie Show, H.R. Pufnstuf, Scooby Doo, Flipper, Gumby, Mister Rogers and many many more