Ah, I see, sorry for the mis-understanding.
Will all the modules go on one page?
No. You would normally use at least three pages and maybe four (this is my default setup anyway).
Page 1 is your "store front" and will contain a Store Catalog and a Store Menu. You may also like to put a store mini-cart on your store front page. This page is visible to all users.
Page 2 would contain a Store Account and would probably be called "My Basket", when the user navigates to this page they will (not suprisingly) see their shopping basket and a checkout link. This page is visible to all users.
Page 3 (optional but I do it) would be "My Account". This will again contain a Store Account module, but the page is only visible to registered users. I do this so that my customers have a Basket and Account page (even though they contain the same module) as I believe this is a better user experience.
Page 4 contains your Store Admin and is visible to Administrators only. To avoid errors, only the Store Admin module should exist on this page.
Store "Story"For an example of the screen flow, have a look at my
production site (don't place orders here!!) or my
demo here (you can place orders here - it's only a demo - but please note that it's not a default Store installation so some features aren't available in Store - I provide it here as a demo of the shopping process I usually setup).
Hope that helps?