Fred Rogers first appears as the on-camera host of "Misterogers," a 15-minute daily show for children that ran on the Canadian Broadcasting Corporation. The show was the successor to "Children's Corner" (1954-1961) and the forerunner to "Mister Rogers' Neighborhood" (1968-2001). From the episode list at The Neighborhood Archive Blog, it appears Rogers' first on-camera appearance was in mid-October, 1963.
Photo from CBC; note the spelling of the word "neighbourhood."
* Biography (from Fred Rogers Center): @
* Biography (from The Fred Rogers Company): @
* Interview (from the Archive of American Television): @
* "Mister Rogers: A Biography of the Wonderful Life of Fred Rogers" (Jennifer Warner, 2013): @
* "Fred Rogers and His Legacy" (chapter from "Pittsburgh Film History: On Set in the Steel City," John Tiech, 2012): @