Hello,
You can set default variations and “Add to Cart” button will appear:
http://docs.woothemes.com/document/variable-product/ (“Add variations” paragraph).
Add this code in custom.css file to remove “Product Description”:
.content_tab_description h2 {display: none !important;}
and this code to remove breadcrumbs:
.woocommerce-breadcrumb, #breadcrumb {
display: none !important;
}
How to create custom.css you can watch in this tutorial.
Could you please show a screenshot what you want to modify on products page?
Regards,
Eva Kemp.