Hi Lewis,
Unfortunately the page meta options don’t work for the shop page, as WooCommerce changes the page to be an archive.
1) You could remove this with custom css if you like, but it would be for all product shop/category pages. Add the following to the custom css box within theme options:
.post-type-archive-product .page-heading { display: none!important; }
2) You can change the breadcrumb setup in Settings > Breadcrumb NavXT, and edit the product breadcrumb setup.
3) You might need to use an SEO plugin to change this, as far as I can see WooCommerce is setting this.
– Ed