Hello,
1) “Filter by price” is shown on categories with products. If your product category is empty, there are no prices for filtering. As I can see, only 2 categories have products on your site.
2) Have you sorted out http://prntscr.com/p2mnha ?
Here is a video about Variation Swatches – https://youtu.be/XO-PDvhPypc
Regards