Hi,
1. This means that the template doesn't support bootstrap popup. Simply change the option "popup mode" of the HikaShop configuration to "mootools" and that should fix the problem. But if you want to remove the button you can remove it by editing the file "showcart" of the view "cart" via the menu Display>Views and removing the code:
<td><?php
echo $this->popup->display(
'<span class="icon-32-print" title="'. JText::_('HIKA_PRINT').'"></span>'. JText::_('HIKA_PRINT'),
'HIKA_PRINT',
hikashop_completeLink('cart&task=showcart&cart_type='.$cart_type.'&cart_id='.$cart_id,true),
'hikashop_print_cart',
760, 480, '', '', 'link'
);
?></td>
2. I'll let Xavier answer about that on monday as I don't know why it is like that. You can remove the save button by editing the file "showcart" of the view "cart" via the menu Display>Views and removing the code:
<td>
<a href="#" onclick="javascript:document.forms['hikashop_show_cart_form'].submit();">
<span class="icon-32-save" title="<?php echo JText::_('HIKA_SAVE'); ?>"></span> <?php echo JText::_('HIKA_SAVE'); ?>
</a>
</td>
3. Then, deactivate the HikaShop affiliate plugin in the Joomla plugins manager and it will remove the affiliate program from the user control panel.
4. This is a feature of your template. I don't know how you can activate that. Please contact your template provider for help on that.