Hi,

1/ To do that please do following steps:

a) Go to Dashboard > Settings > Discussion > and check to "Comment author must fill out name and email"

b) Go to Customize > Single Post Options > and check to "Remove checkbox "Save my name, email, and website in this browser for the next time I comment.""

c) Add more this code to Customize > Custom CSS to remove the email & website fileds on the comment:

#respond p.comment-form-author, #respond p.comment-form-email, #respond p.comment-form-url{ width: 100%; margin-left: 0; }
#respond p.comment-form-email, #respond p.comment-form-url{ display: none; }

2/ Unfortunately, currently this theme doesn't support for this feature.

Best Regards,

PenciDesign