Well, quite a mess of questions, I'll try to give some answers in a proper order.
There are slight, but unimportant differences in the nomenclature of SF-igniters, depending on various sources.
Anyway SF stands for sofort / instantly.
1.) To.Mi.Z. or D.Z. SF 1 (Druckzünder sofort 1)
the ampoules are containing sulfuric acid (clear liquid) and a mixture of potassium nitrate & sugar (the silvery one).
2.) E.Z.S.F.M 2 (Entlastungszünder sofort Metall 2) or abbrevated EZ 44
the metal anti-lifting device with a short running (approx. 1 1/2 minutes) clockwork as a safeguard.
3.) E.Z.S.F. 3 (Entlastungszünder sofort 3)
the bakelite- version with a chemical safeguard.
4.) D.Z.S.F. 4 (Druckzünder sofort Metall 4) or more common as SM 4 or Hebelzünder 44
the designation Schuco is derived from the manufacturer (code gzx 44), Schreyer & Co., Spielwarenfabrik, Nürnberg). This old company produced
fine mechanical tin toys before the war until today.
5.) D.Z.S.F. 5 (Druckzünder sofort 5)
Dr.Buck, Göppingen is regarded as the inventor of this igniter. Very nteresting that he had a branch in Paris; the single manufacturer I know is an
unknown company (code peg), which also made the To.Mi.Z. and glass parts for the To.Mi.itself.
6.) D.Z.S.F. 6 (Druckzünder sofort 6)
the small chemical igniter with a pressure-sensitive mixture inside.
7.) D.Z.S.F. 18 (Druckzünder sofort 18)
a glass fuze plate with integrated To.Mi.Z.-system for the Glasmine 43 (instead of the differently graded metal plate for use with D.Z.S.F. 4 ,5 and 6), the
ultimate metal free version (except the detonator).
I don't believe that there are much developments between the numbers 7 - 17; there might be one I've seen in the past, but first have to make a deep
search in my picture-collection.