Hi Raj ,
First and foremost - Inbound refinery is not the actual means with which contents are ingested in content server . It is done by Webcenter Content server which holds / processes all the content items .
IBR is used only for conversion of documents from 1 format to PDF (and some other) .
So , in your case , first you have to set up a Content server and then install Desktop Integration Suite client on your physical machine . With this in place , you can drag - drop the entire set of contents from file system to content server .
Documentation links for all this are available from the following links :
Desktop Integration Suite : http://docs.oracle.com/cd/E28280_01/doc.1111/e10624/toc.htm
Please go through the documentations first to get these basic concepts cleared .