Hello,
a) Please add this code into custom.css file:
#main-nav > ul > li:first-child {
padding-right: 30px;
}
#main-nav > ul > li { padding: 3px 30px 3px 1px; }
To create custom.css you need rename default.custom.css to custom.css located in wp-content/themes/blanco directory and enable it in Blanco – Theme Settings > General > tick “Enable Custom CSS file”.
b), c) You need select another page for products in Woocommerce > Settings > Products tab > “Product Archive / Shop Page” field.
Regards,
Eva Kemp.