I don't understand what exactly you meant. How possibly you display all product details in the category page? There is no enough space...
Maybe, you this would work for you
-- You are going to have a special category layout that will give you what you need (and only a a special Menu-Item will be linked to this category layout)
-- Possibly, having 1 product per row in the category page is a good idea; so you get more space to put details for each product, and disable the other alternative views (GRID and MultiGrid view layouts)
-- Include more details about the product on the category page (depends on your need)
-- Basically shoppers will be able to add product to cart via Category Page directly, without jumping to product details page.
But again, these are all considered as 100% custom modifications (because you want to change how things function or look). Unfortunately we don't provide free-support or step by-step instructions for custom coding modifications.
then let us take care this customization for you directly on your website.
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