Which font you are referring ? font-icon or text ? Read the documentation for overriding CSS and its update proof.
Keep up the good work, Rahul!
It will not appear, on question form. As it need some UI changes so we will enable that in 2.3
There is an option in AnsPress options -> General.
What is you AnsPress version ? and what is current user role ?
Please update to latest version, older version are not safe.