The Toaster was a good friend of Rob, the Master, who took pleasure in having him see his reflection in her silver faceplate and making faces as he waited for his toast to cook. After the Master left several years ago, the Toaster was one of the few appliances in the house who never lost faith in the Master's eventual return.
One day, while the Toaster and her four friends, Kirby, Lampy, Radio, and Blanky are cleaning the cottage, they see a man outside their window putting up a "For Sale" sign, meaning that the Master was not returning. Fed up and refusing to believe that the Master would actually abandon them deliberately, the Toaster declared that she and her troops would go out to find him. Despite initial reluctance, they all agree and set out into the wilderness. They come across many dangers along the way, but the Toaster manages to maintain hope, even when all seemed lost. Eventually, they are found by an appliance repair man after nearly drowning in a swamp. The repair man tries to dismantle the group but they escape. Finally, they reach the Master's city and go to his apartment. There, they are derided and thrown out by the Master's new appliances, who all believe themselves to be far more modern than the Toaster's group. They are hauled off to the junkyard to await disposal.
Unknown to the Toaster, the Master actually returned to the cottage, hoping to collect his favorite appliances for use in college. When he did not find them, he and his girlfriend Chris journeyed to the junkyard to dig up some spare appliances, since the Master did not love the modern appliances as he did his old ones. While there, he finds most of his appliances, who have been dodging an evil magnet crane determined to destroy them. The Giant Magnet nearly causes the Master to get crushed by the Crusher, but the Toaster sacrifices herself by throwing herself into the gears, saving her Master's life. Upon returning home with all of his appliances, the Master fully repairs Toaster, and makes faces in his faceplate like he did as a kid. The Toaster and her friends accompany their friend to college, happy to serve him once again.
- In the Timon & Pumbaa series, during Timon and Pumbaa's music video of "Stand by Me", a toaster that resembles the Toaster is seen.
- There is a cameo of Toaster and friends in the series The Oz Kids, in the episode "Christmas in Oz".
- According to the original novella, Toaster is a Sunbeam.
- The Toaster is a female. Ironically, while the Toaster is referred to as "she" in the movies, "her" voice actress Deanna Oliver calls the Toaster "she" and "her." Thomas M. Disch refers to Toaster as "it".
- Toaster is one of very few female characters to be voiced by females, including Stanley from the television series of the same name (as voiced by Jessica Stone), Lester from the same show (Philece Sampler), Huey, Dewey and Louie (Pamela Adlon and E.G. Daily in Quack Pack and Russi Taylor just about otherwise; though they are sometimes voiced by actual men using childlike voices), Rolly and Lucky in 101 Dalmatians (both film and TV series), Binky Bevel from Rolie Polie Olie (Sunday Muse), Honker Muddlefoot in Darkwing Duck (Katie Leigh), Beary in The Country Bears (of course, this applies to his singing voice alone), and Robbie in The Brave Little Toaster Goes to Mars (Russi Taylor again).
- Also, the Toaster is voiced by a woman in the German, Latin Spanish, Finnish, Russian, and Croatian dubs, which means that the women who voiced her have the same gender as her.