1. We want our searches for pdf attachment to have some content in them and not just a the title.
2. Is there a way to save the pdf content to the WordPress database instead of just indexing it so that I can use a regular engine and not the index table engine.
3. I tried to parse the pdf on the display side using a custom code and using your plugin resources but its giving me an empty content.
Well for that you will have to save them as custom post types, that is probably the simplest solution. Parsing the PDF contents and saving as the custom post type contents or similar. Please mind that parsing PDF via PHP is not a simple task, you will have to look for external PDF parsing libraries to do so. TCPDF is probably the best out there.