Neemobeer says it right, the mail file can be extracted easily from Control Panel>Mail. The OST file contains all your emails with the right details of the mail folders. If that doesn't work, you shall look out for some tools that could extract the OST files.
Hello. I don't really know what you mean by this. You just can open the file and copy it. But I am missing some details probably. And I will share something that extracts emails from a ton of file times, here you go letsextract.com