In the comments table, you should have a column that relates the comment to the user that posted it. You would need to create a join query to return the users information, along with the comment.
I dont know the structure of your users table of the structure of your comments table, so cannot giver you the exact SQL query to use, but it would be something along the lines of:
SELECT users.firstName, users.lastName, users.profilePic, comments.*
INNER JOIN users ON comments.userID = users.userID
then to display that on your comments page you can use the bindings panel to bind the userFirslt name and last name column, and add an image tag to show their profile picture:
<img src="path/to/images/<?php echo $row_RecordsetName['profilePic']; ?>" />
to show the date the comment was made, your comments table would need to have a date column that stored the date, then use the bindings panel to add the binding for the date just like the others.