what do you need to know?
how to ride it, how to work the mechanisms, how to maintain it, how to tell what (if anything) is broken, how to fix it, how much it's worth, or . . . ?
I can tell you a few things that probably don't help you: Padova is a place in Italy (usually spelled "Padua" in English). Lots of bikes have been made there for a long time (including a DeBernardi I own). Tange is a Japanese company that has been making quality bicycle frame tubing for a long time. CR-MO is a steel alloy containing chromium and molybdenum to make it stronger.
A description of the components on the bike (including brands and model names/numbers) would be more informative than merely the labels on the frame, since a given frame can be built up with many different types and levels of components.
Do you know how old it is? Did you ask the guy you bought it from?
Edit after seeing Fred's post: I have an old Atala, too. Didn't know it was from Padua (a quick Google search indicates they "are" made there, not "were"). So my stable has an accidental geographic bias. Pretty sure my other bike is from Taiwan, though.