On the new machine -

Is the instance running?
If so, is the shell window you are using set with the correct ORACLE_SID? If you want to be sure about the connection, add the net service name descriptor after system/manager (so userid=system/manager@dbname), presuming, of course, your Net8 configuration files have been updated to reflect the dname for your database.

What would you be changing in the init.ora between databases? I'd do the import with the same parameters, then make any init.ora changes after the import completed in a successful manner.