Modification customer account

-- url of the page with the problem -- : sizaspeelotheek.nl/index.php/registratie/user
-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3..6.5
-- PHP version -- : 5.6
-- Browser(s) name and version -- : firefox 50.0.2

A registered user can modify his account. I want to modify the following items:
1. At "Change account information": delete "standard settings" (not te be changed by the customer)
2. At "Show cart": delete some columns ("Product price", "in stock", "Total price")
3. Delete here the row title "Total"
How can I do that?