TD: anything Moog-like. Basically, 5U-type stuff, or Eurorack gear that uses typical 1970s subtractive methods. The fact is that a lot of Tangerine Dream's sound was not due to the modulars...these mainly dealt with the sequencing layers. More typical gear would be devices such as Oberheim SEM polysynths, Elka Rhapsody, and later the initial PPG Wave series, starting with the 340/380 and going on from there. And Edgar's guitar work.
Kraftwerk: none. Much of what they did during their classic period between "Autobahn" and "Computer World" was on off-the-rack devices as well as some custom gear, but none of this was modular. The spacier parts of their work often made use of an instrument that I can guarantee you will NEVER, EVER get your hands on called a Vako Orchestron., which was something like a 'pro-grade' Mattel Optigan. I might be one of the very few users on MG to have ever played one, perhaps, since both Vako and I are products of Nashville, and I got to have a bit of time with one c. 1979. After "Computer World", a lot of what you hear up until "TDF Soundtracks" was Synclavier.