I love techno music. It is a form of electronic dance music that originated in Detroit, MI.
I like it too . It's great to workout and exercise too, in addition to dancing.
There are now many different styles, but Detroit techno is still the foundation.
It's usually from DJ's who mix and splice tracks and some of them are really good. 
That is true. DJs do not make the music from scratch. They craft it from existing recorded music.
It was called Kraftwerk, in the 80's by Juan Atkins. 
Yes. Juan Atkins is credited as the originator of techno music.