Hello,
I saw the screenshot you attached.
1) You can disable the number of columns selectors from Theme Settings >> Product Archive >> Product Grid.
Screenshot for Clarification: https://gyazo.com/02364fe55af36078cfab88fc1ed5f530
And to disable the default sorting try adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.
.woocommerce-ordering {
display: none;
}
2) You can read the information about the related products section in WooCommerce plugin’s documentation https://docs.woocommerce.com/document/related-products-up-sells-and-cross-sells/
Regards.
Xtemos Studios.