Hello,
1. This is not possible by default. Please describe the desired result in details, for example, do you want to get this in sidebar or on some particular page, and we will try to suggest you some workaround.
2. Is this solved http://prntscr.com/idk1b2 ? if not, please provide me link to page where you want to remove the text.
3. Please delete this code from Theme Options > Styling > Custom css https://prnt.sc/idk3cx then you will be able to change color of buttons via Theme Options > Styling -> Content > Customize buttons.
Regards