Hello,
Sorry for the delay in answering. We have a lot of requests during the last few days.
1) I think you need to contact plugin author for details information because read the item 3) below. We are able to help you with built-in feature and third-party plugins that you use on your site are outside the theme support.
2)To disable Testimonials go to Theme Options > General > http://prntscr.com/pbrlye
3) Sorry but should not you to create the custom taxonomy for your custom post type and choose it in custom post type settings http://prntscr.com/pbrqys ?
4) Why don’t you post the receipt before searching it http://prntscr.com/pbrv6a ? I don’t see any problem with the search if published your custom post type https://gyazo.com/2588be5b31c68b24204f7d3afcf1e73d
We would be grateful if the next questions will be related to our theme option and not to your customization because we are not the hired developers. We have a lot of clients who need help with our theme settings and they are waiting for our help. Hope for your understanding.
Regards