At home I have AutoCAD Ver. 14, and I am in the middle of completing a solids drawing of a home built into a hillside.  Now I need to place furniture within the drawing.  Those 3D files available here are incompatible with 14   1) Are there any furniture blocks available that are compatible? and 2) Can the incompatible version blocks be converted easily?

Download DWG Trueview and use it to covert DWG files saved in more recent file formats back to one compatible with release 14.