Yes.
Yes, she was just learning to walk.
And Maggie Makes Three | S06E13
Margaret "Maggie" Simpson is a fictional character in the animated television series The Simpsons. She first appeared on television in the Tracey Ullman Show short "Good Night" on April 19, 1987. Maggie was created and designed by cartoonist Matt Groening while he was waiting in the lobby of James L. Brooks's office. She received her first name from Groening's youngest sister. After appearing on The Tracey Ullman Show for three years, the Simpson family was given their own series on the Fox Broadcasting Company which debuted December 17, 1989.
There are several episodes of the Simpsons in which Homer sings to Marge. For example, there is the 4th episode of season 14.
There are far too many to list here and it's doubtful you would want to read a list that long.Your best bet is to Google Milhouse Van Houten Simpsons Wiki the list can be found there.
It debuted on The Simpsons second episode in 1990, but it was released on the first Simpsons soundtrack in 1997, Songs in the Key of Springfield.
And Maggie Makes Three | S06E13
Simpsons Roasting on an Open Fire
Your question makes no sense as there are no episodes "in" the Simpsons Movie. Are you asking When was the first episode? or When was the first Simpsons Movie? The first episode aired December 17th 1989. The first (& only) Simpsons Movie debuted on July 27th 2007.
The first episode is Simpsons Roasting on an Open Fire. This episode is about Christmas seems doomed for the Simpson family when Homer receives no Christmas Bonus. Homer becomes a mall Santa Claus, hoping to make money and bring Marge, Bart, Lisa, and baby Maggie, a happy holiday.
He first met his mother, Mona Simpson (voiced by Glenn Close) in "Mother Simpson", season 7, episode 8 which aired in 1995.
Homer's mothers name is Mona Simpsons. We first learn this in the episode "O' Brother Where Art Thou". Homer also learns he has a Half-Brother in this same episode.
if by video u mean episode, then the first episode in the simpsons is called "Simpsons Roasting on an Open Fire."
Marge
He was one of the first characters
Margaret "Maggie" Simpson is a fictional character in the animated television series The Simpsons. She first appeared on television in the Tracey Ullman Show short "Good Night" on April 19, 1987. Maggie was created and designed by cartoonist Matt Groening while he was waiting in the lobby of James L. Brooks's office. She received her first name from Groening's youngest sister. After appearing on The Tracey Ullman Show for three years, the Simpson family was given their own series on the Fox Broadcasting Company which debuted December 17, 1989.
Cody Simpson's first album is called 4UEP.
There are several episodes of the Simpsons in which Homer sings to Marge. For example, there is the 4th episode of season 14.