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I would also suggest you apply the latest PSU patch (currently 220.127.116.11.4) to the target before you perform the import.
Quick Reference to RDBMS Database Patchset Patch Numbers [ID 753736.1]
Yes, you can perform a full import without having to use the EXCLUDE clause. Pl see the steps in the documentation
Expdp will not export schemas such as SYS, ORDSYS, MDSYS etc - http://docs.oracle.com/cd/E11882_01/server.112/e22490/dp_export.htm#i1006790
You do not have to re-run the catalog scripts after the import.