Kellogg's Pop-Tarts have been around since the mid-60's, at least. In 1970, the company decided the pastry treat needed an animated spokesman, just like some of their cereals.
Enter, then, Milton the Toaster. Character actor William Schallert (ex-The Patty Duke Show, Dobie Gillis) landed the plum gig. At the time, Schallert was also one of the studio announcers for ABC. Scope out Milton's debut:
More than 25 years later, Kellogg's tried out the talking toaster gimmick again. This time, though, it was a nameless appliance, voiced by Gilbert Gottfried (Aladdin, ex-Saturday Night Live). We'll get something from that era up another time.