Hello,
1. At first please update theme to the latest version http://xstore.helpscoutdocs.com/article/63-theme-update also, update all required plugins: https://www.8theme.com/download-plugins/
2. Sorry, but your question is bit unclear. Could you specify in details and provide screenshot, please?
3. This is related to Wishlist plugin. We recommend you to contact the plugin developer regarding it.
4. It is necessary for woocommerce work, otherwise, add to cart won’t work.
Regards