This closing line comes from a British comedy show from the 1970s called "The Two Ronnies". It starred Ronnie Barker and Ronnie Corbett.
The lines are:
Ronnie Corbett: "It's goodnight from me"
Ronnie Barker: "And it's goodnight from him!"
Either could be used depending on context. For example, "I said goodnight to Mary" or "I said goodnight and Mary said goodnight, too." The first sentence implies that I directed my words toward Mary and not toward someone else. The second sentence means that both Mary and I said goodnight, without specifying to whom we addressed our words. You would generally say goodnight to someone. You would rarely use the word "too" after goodnight. If you did, it would mean "also."
George Burns, her husband.
Romeo
You could say something like, "Sweet dreams, my love. Can't wait to see you in the morning."
It was usually said after someone said something sexual or sexual-sounding. Think about it.
Topo Gigio to Ed Sullivan
Well tonight I heard him said good night my lady
The phrase "thank you and goodnight" is a common expression used to conclude events or interactions in a polite manner. It doesn't have a specific original source or author.
Walter-Winchell
"Goodnight Goodnight" by Hot Hot Heat was released in 2002 as part of their album "Make Up the Breakdown."
Goodnight is a noun. It's the subject in the sentence, "Goodnight [to you]."
Charles Goodnight was buried in Goodnight Cemetery in Goodnight, Texas. Goodnight was a legendary figure in the American West, known as the "father of the Texas Panhandle."