Implementing 'share' buttons into blog

This is a simple project. I would like to change the 'share' button functionality of my blog - [login to view URL] At present, there are static buttons which I want removed. I have attached images which roughly show how I want the new buttons to function. The first image ([login to view URL]) shows how I want the home page view to look. I want share buttons which display the tweet count and fb like count. The image isn't quite accurate - I want to use the official twitter tweet button and the facebook like button. If there is space I also want to use the 'addthis' button but I don't think there is space. From what I gather, these buttons use an iFrame to function so this will need to be embedded into the code of the page template. The second image shows how I want the share buttons on the main page to look )[login to view URL]). At present, you will see static share buttons at the top and bottom of the post, which I want removed. In their place I want a share bar introduced on the side of the post which scrolls up and down the page as the user moves around the page. I can direct you to examples of this functionality if needed. The buttons I want included are the official tweet button, the facebook like button,. and the 'addthis' button - not the three shown in the image. This should be a simple project for a knowledgeable coder.