Add a Checkout, and 3d views to a website

I have a small website, this site is used as a prototype, and will not be published or actually used by anyone. I have attached the entire website. 1)I need the checkout feature to work, i need the site to be able to register users and check them out and update their cart. it doesn't have to do any verification, just a very basic checkout. This will go when you click checkout in the "productdetail" and "productdetailmug" sites, once clicked, it will ask the user to log in or create account, after which it will update cart. from the cart, once you click on complete order, it just gives a messege that the order has gone through, it does actually have to put in the order. 2)In the "ProductDetails" page, and the "ProductDetailMug" page, around the picture there are two options that are currently not active. One is "clcik here to customize product" and the other is "click here view in 3D". i want these designed to work. for the customize features, i want it to look the the "[login to view URL]" and "[login to view URL]" pictures included in the zip file. this feature allowes the user to add a picture to the object. The view in 3d feature, i want it to pop up a page with a picture of the object and ability to rotate it. It doesnt have to be perfect or actually 3D, the ability to click right and left and the object appears at a diffrent angle.