I believe this is the movie "Computercide" from 1982.  It is a bit later than you listed, but has the scene with the typewriter and microphone.  The following [Site][1] shows it at timestamp 4:07. 

From [IMDB][2]

"The year is 1995 and Michael Stringer is the only private eye left on Earth. One day, he is assigned by a woman to investigate Eden Isle, a complex for people who want a perfect life started by an industrialist named Korter. Interestingly, Korter is found on a beach and is 20 years younger than he was before. When he gets into the complex, he is caught in a web of mystery that he might not get out of. "

I remember Donald Pleasence in this movie stating that the egg had become obsolete because they could raise chickens directly. This was a real disappoint to the Detective because he really like eating eggs. 

The old car is at 11:02.

![Old Car][3]


![Typewriter with Microphone][4]


  [1]: http://wiki.onemovie.tv/movies/1804786-computercide
  [2]: http://www.imdb.com/title/tt0083753/plotsummary?ref_=tt_ov_pl
  [3]: https://i.sstatic.net/gagKC.png
  [4]: https://i.sstatic.net/nXlai.png