To create a drawings form the skethcup model, you export it to Layout - which is the drawing side of SketchUp toolset.
if you download the sketchup pro app ( free 30 days license) it comes with Layout, which is an app that imports the sketchup views onto a flat sheet, which can then be either printed ( to a printer ) or to a PDF.
see
http://www.sketchup.com/learn/videos/841
http://www.sketchup.com/learn/videos/841
The sheet size can be predetermined ( like most apps) and the scale of the imported drawing can be adjusted to suit - i.e. 1:1 (full size) or 1:25 if you like.
hope that helps