:Hi. Lots of points, I'll reply as best I can:
Listing the squadrons and their aircraft types is too much /for this article/ but not too much for Wikipedia. Only listing the serial numbers, pilots or other minutiae is too much for Wikipedia. One way you could try would be to create a "sandbox" page for yourself, say User:FFA P-16/Sandbox, write up the squadrons as best you can and then ask at Wikipedia talk:WikiProject Aircraft‎ if we can look at it, tidy up the English, etc. and advise on the best page to put it on. Ground instruction airframes are not notable unless there is some special reason, for example if the airframe itself is notable from earlier in its life. 
Re. the ordering of the list, I would have to think about that but it is really a separate discussion. 
You say that the serial numbering (tail numbering) uses a special system. I would like to see this system explained, but it needs just a few examples to show the principles, not the whole list.
If Swiss writers routinely quote the serial number of an aircraft when writing about it, as a way of showing the information contained in the number, then you should be able to reference this. Such references might convince us that the Swiss Air Force is an exception to the general rule. We Wikipedia editors do like to see hard evidence, not just another editor's word. And, as you have noticed, we sadly know little of the Swiss Air Force unless someone can find reliable sources for us. — Cheers,  (Talk)