Customize woocommerce Eshop

A. Control panel Order Page 1. On the order page i would like to add Next order button , previous order button. 2. While i am on the control panel on the order page, on the search i should be able to search the note/business notes 3. Add the search field inside the order page 4. When a customer buys something sometimes the the word VAT is shown in English and some times in Greek. I would like only the Greek word (ΦΠΑ). Also in the WooCommerce PDF Invoices 5. The only tax i use is the Greek taxes 23% so when i choose to insert a product on the order page i need to be shown with the taxes B. Customer data 1. IF my customer wants an invoice then we need to add more data on their order. This meta fields needs to be saved on the order and on the customer information for later use. Moro-ever this meta should be able to be edited/added while i create a manual order on the order page. For better explanation i had added screenshots.