Hi,
1. That's the Joomla profile edition page, it's not a HikaShop page. Editing the XML file for the profile view seems to be the way to go about it:
forum.joomla.org/viewtopic.php?t=814757#p3089114
2. Again, that's something controlled by Joomla. There is actually a setting in the Joomla user manager options page to deactivate that area.
3. There is no address type in HikaShop. When you add an address, it can be used both for shipping and billing.
4. It looks like a problem with the CSS of your Joomla template. Switch to the default template of Joomla temporarily and it should look fine. So you'll have to see with your template provider what modification is necessary in the CSS of the template to not break the display like that.