Just tried to add items to cart and it works. Here is the screen shot
In order to enable SSL you should buy a wildcard SSL certificate and we will install it for you.
As to the template issue, you should check your website for HTML validation errors and try to fix at least end tag errors on your original website. There are 96 validation errors on your websitehttp://validator.w3.org/check?uri=coolr ... ne&group=0