If you wish to use the same data files, to clone the database, then that is a bit tricky. Presuming that you have already installed the Oracle software, you must:
1) Ensure that you are using the same-flavoured operating system (i.e., Solaris to Solaris, or Windows to Windows). [If you are using Windows, you must ensure that you have run the appropriate "oradim" command to create the Oracle service on the target machine. Start the service on Windows.]
2) Copy all database files from the source machine to the target machine. Bring across all files that you would need to make the source database run: for example, parameter file, database data files, on-line redo log files, and control files.
3) Using SQL*Plus, attempt to start the cloned database. Address any startup errors that you may encounter.
Let us know your findings.
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Mufasa
(aka Dave of Sandy, Utah, USA)
[I can provide you with low-cost, remote Database Administration services: see our website and contact me via
www.dasages.com]