Question: I know the pilot was shot and shown in 1989, but were there any other episodes shot and or shown along with the pilot?
Question: Kramer never seems to work, how does he pay for an apartment in NYC, even in the 90s they were still expensive, is his means of income ever revealed?
Answer: In the episode where Kramer goes to baseball fantasy camp, George says Kramer's life is a fantasy camp and that he "fell ass-backwards into money." It's never explained where this money comes from or what Kramer did to get it, but that's how he's able to afford the lifestyle he leads. Although the episode where Jerry buys his dad a Cadillac, Kramer sees the check Jerry earned for his comedy gig and didn't realise Jerry made so much money that he felt uncomfortable about knowing the amount, so it's not like Kramer is sitting on a ton of money, which is why he does all his schemes and side jobs.
Answer: This is gleaned from the Internet, though it seems a bit far-fetched that it would provide enough for all his living expenses: Kramer has a variety of ways of making a living, including gambling, working in various theater projects, acting out illnesses at a medical school, getting a spot on the show "Murphy Brown", and pitching ideas for inventions like his "Coffee Table Book."
The Switch - S6-E11
Question: When Jerry and George are discussing how to do The Switch (hence the title of the episode) what is the name of the melody that accompanies their conversation and who composed it?
Answer: I just Shazammed the music. It is a Jazz piece called "West Side Blues" by John Cameron. A search in IMDb corroborated this.
Chosen answer: The composer of nearly all the melodies that are heard in the show is Jonathan Wolff. As far as the name of the the melody; little interludes such as this are rarely named because they are not complete songs, just intro's or outtro's that are written to help move the action of the show along.
Answer: No, The Seinfeld Chronicles (the first episode) was filmed and broadcast by itself, and eventually the series was picked up by NBC. Only then was the next episode - "Male Unbonding" - filmed. The next episode to air after the pilot was "The Stakeout", almost a year after the pilot was broadcast.