Desarrollar módulo web, nuevo link

I need development or enable a new link in my website My website its design with wordpress and i need a new link that avoid select many ítems (products) to order online The customer need to select different products for order online without having to pay, the payment option must to be disabled. I just need that the customer select various products (products must have title, description, price and picture) and send an email with the order of the selected products. The customer will go to my store to withdraw the order, each order must have a unique number-id, and pay at my store, we currently do not need to pay on the web, but in the future I can enable this option