A lot of posts are very basic, It's good that you've loads of queries. However, I would suggest you to look around for tutorials; they are easiily avaialable and try them at first. Here are couple of links to cover topics which are realated to your post. http://www.alistapart.com/articles/dropdowns http://www.echoecho.com/csslinks.htm http://www.cssplay.co.uk/menus/tutorial.html http://ryanfait.com/resources/footer-stick-to-bottom-of-page/ http://blog.rajatpandit.com/2008/06/19/making-footer-stick-to-the-bottom-of-the-page/ http://www.w3schools.com/
http://css.maxdesign.com.au/listamatic/ http://htmldog.com/articles/suckerfish/dropdowns/ http://sixrevisions.com/css/30-exceptional-css-navigation-techniques/ And for a bit of inspiration: http://www.smashingmagazine.com/2007/03/14/css-based-navigation-menus-modern-solutions/
I use SoThink DHTML menu builder. its a great software and has a lot of templates by default. you can just enter your links and menu items and set it up quickly. http://www.sothink.com/product/dhtmlmenu/