Is there any free software which can help me to view and print AutoCad drawing files????

Uh, no? That is why AutoCad can charge so much. Maybe get a PC at home and install an unlicensed version, then take some work home? If that will not work, I am sorry. Your boss should have a little pity. I have a version of Autodesk Maya that is questionable, but they want $7000 for the license. GAK!!!!