Back to the original posters problem: He has a sketchup file without components and wants to get measurements and know the various pieces required to build.
Okay, measurements are easy using the tape measure tool.
The various pieces are not so easy, he will have to decide for himself what the various pieces are and redraw them, either in the program or on paper.
Essentially, the sketchup file is useless for his needs as is.
All the discussion of what program he should use, should have used, how the model should have been drawn, etc. do not address the questions he asked.
Mike
From the workshop under the staircase, Clinton Township, MI
Semper Audere!