Joomla Site Modules and More

We want to develop a Joomla managed web site that's already running. We want to add modules to the home page that will be search engine friendly and leading the surfer to other pages, or forms or content. There will be approximately 5 modules (with room to add more) on the front page. Just a nice bite sized way of providing summary information about the site's services at a glance on the home page. In addition, one modules will lead to a sign up (subscribe button) that triggers the delivery of either a report or mp3 download one of the modules will be an audio file player one of the modules will lead to a page with an enquiry form (using smartformer) one of the modules will lead to a page with an embedded form for a call back service Two to three of the remaining modules will just be straightforward links to inner pages on the site. We'd also like to add Twitter buttons, Facebook buttons and a Youtube button on the home page of the site.