Check help center for compatible versions for import. Information about Creo Parametric is available in article CS134024
You do know you are replying to a 14 year old post?
Anyway, if you receive an AutoCAD 2018 drawing, then you still have a problem as even Creo 5.0 can't import that.
So you will need to convert your AutoCAD 2018 drawing to an older version. You can use Autodesk DWG TrueView to do the conversion.