knowledge is missing in your head, but the force is strong in you, young jedi
get yourself archicad documentation tutorials and books
read more about archicad translators
with archicad and organizer you can export all drawings with one click and using archicad translators you can adjust any setings you like to be exported.
When you finish your project alwys save it like archive so you will have all lib.included.
Moving backward in archicad is not simple as let say autocad...so you have to do it step by step, carefully exporting from 15 to 14 to 13 etc with librarys included...
I didnt have any problem exporting any 3d from archicad to any other software. If you have some specific problem, plz write.