two questions

Hi; I was wondering if anyone has had any experience with deleting programs from launchpad. Mine is a bit of a mess, showing stuff that I don't need or applications that have already been deleted or moved. Is there a way to remove these from launchpad? Also, can anyone tell me how to find and restore old email messages from time machine? I deleted an email message but have backed older messages up to time machine. I select the date I want but can't figure out how to retrieve the emails. Where are they located? Thanks for the help.