Not all TV shows have title songs, but for those that do. I consider a TV show song to be a TV show title song if it meets the following two criteria:
1. It was specifically made for the TV show.
2. The lyrics of the song contain the title of the TV show at least once.
Here are some of my favorites:
"Car 54, Where Are You?"
https://www.youtube.com/watch?v=S5MkCAwupe0
The theme song from the original TV show version of "The Addams Family".
https://www.youtube.com/watch?v=cfawtDT945o
The longest version of the theme song from "Sesame Street".
https://www.youtube.com/watch?v=LWoPI2XVybI
"The Brady Bunch"
https://www.youtube.com/watch?v=he4WPvKGGR0
"WKRP in Cincinnati"
https://www.youtube.com/watch?v=YQvCNLIVydM
"3-2-1 Contact"
https://www.youtube.com/watch?v=s2-LEBc2sO8
"Reading Rainbow"
https://www.youtube.com/watch?v=4Ygs3IHJ2bM
"Garfield and Friends"
https://www.youtube.com/watch?v=BvYE46dUKVQ
"The Magic School Bus", which was sung by none other than Little Richard:
https://www.youtube.com/watch?v=-azpNkFZs1Q
"Where in the World Is Carmen Sandiego?"
https://www.youtube.com/watch?v=E9aDMuBjR7Q
Those are some of my favorites. Feel free to share yours with me. Have a nice day.