5. Multi language can be done through custom coding or through a use of a plugin.
6. You can set up Classipress for multi country use and of which might require some code modification.
Again, it is not a current feature since classipress is geared for a general classifieds site platform but it can be implemented with a help a coder.
I suggest that you may wait for the release of version 3.1 as some features that you are looking for might already be included. You can check the schedule of release here
http://appthemes.com/releases/ .