Attributes are only handled in the product info page. Some people have done the work to get them into the product listing, but it requires serious PHP/MySQL skills as well as a thorough knowledge of that part of the Zen Cart code. Search the forum for discussions about it (there may be some code examples posted, I don't recall for sure).

For the product info layout, you need to get started on rearranging the code blocks in tpl_product_info_display.php. If you want someone else to do the whole thing, you should post in Commercial Help Wanted.