Magento store needs all insecure content to be secured and add logo to all email correspondence

We are just about ready to launch our new Magento E-commerce store, [login to view URL], but we have 2 tasks that need to be done before we can launch. The first is that our site has a lot of "insecure content" throughout the site, causing the page to say that the site is insecure. For example: if there is an image on the page and it is hard coded ([login to view URL]) it needs to instead be changed to: [login to view URL] (with https:// not http://) this also goes for javascript files, css files, etc. This is to be an all inclusive task where any and all items must be found and changed so that the site no longer labelled as "insecure". Additionally, we need all e-mail templates that are sent out automatically from our Magento store (INCLUDING THOSE THAT COME FROM OUR DROPSHIPPING MODULE) to include our logo that is found on the homepage.