Vilters
That's an interesting workflow! Thanks, I've learned something new...

charly_hayze
It is not a simple thing you are trying to do.
-What you need in the end is a single mesh per clothing part, so a jacket and a pants mesh. All overlapping vertices need to be welded. Any groups in the mesh will simply fall apart when you run the sim. Interesting effect, but not what you want ;-)
-The meshes need to be one sided, so no lining, no thickness.
-Ad-ons like pockets, buttons, zips, etc. can be applied as soft or hard decorated and will follow the movement of the dynamic cloth (If you are lucky....)

Maybe find some tutorials on dynamic cloth first, to get some general knowledge, and open a few dynamic cloths objects in AC3D to see how they are made. Especially the ones with buttons, etc.

JohnDoe641
Yey, another one converted....;-)

Usually it is a matter of scaling, to cross use dynamic cloths. Try to keep it tight though. Some pokethrough should not be a problem, that should be corrected during the drape stage.

You do not have to use drape first, switch it off in the sim settings, but there should not be any major pokethrough  or the sim won't work out.