Hi,
1. There is no option for that. Joomla handles it automatically, not HikaShop. I suppose that such code modification should do the job :
forum.joomla.org/viewtopic.php?f=42&t=326664#p1989910
But it's an old post and the code probably changed since then, so I would recommend to seek advice on the joomla.org forum.
2. It depends how you configured HikaShop. If you turned off the "simplified breadcrumbs" option of the HikaShop configuration, you should get the category and sub category added to the breacrumb.