Customize Web Template -- 2

Hi, I am starting an e commerce business and am in the process of customizing the template I installed from Big Commerce. I want to make a few adjustments to the sites HTML and I want to install features that I'm told require javascript (I'm obviously not too knowledgable in web design). As far as the HTML adjustments, I want to move the text in the carousel pic to another area of the pic, put a slogan under the logo, enable the category descriptions to be seen, change a section of the home page from product display to text display, change a couple words on the template product pages, remove some of the text at the top of the page, and relocate two of the "resident" categories at the top of the home page. As far as the javascript, I want to be able to have drop down sub descriptions within the existing description page and an "add options" feature that drops down to show and add or subtract additional hardware products. I'm happy to discuss and further details needed. Thanks