I'm not entirely sure that I understand what it is that you want to do with regard to AutoCAD - can you not achieve everything you need to within Stardraw?  For example, if you've got a floorplan in DWG format, you can just open it in Stardraw, make whatever changes and additions you need, then save it back out as DWG, if necessary.  And Stardraw allows you to work with Attributes in symbols and generate whatever reports you need.

In answer to your specific questions:

Yes - you can mix symbols designed for different environments in the same drawing.  The only gotcha is that you might need to play around with scale.  Reporting will work fine though.

You can't 'rotate' a symbol to show a different aspect - i.e. the top view - if the symbol is of the front view: it is only a 2D representation.  Generally plan views are just rectangles or other fairly simple polygons so it's incredibly easy to create your own.

I hope this is helpful - please let me know if I've missed the point.