A. Yes, with a Pro system this can be acheived by putting the admin in their own membership, and then to modify the html template files for adminpages so that the advanced settings button only appears in the membership that the admin belongs to.
A. You can control which memberships or specific members are able to see pages. Doing this you can turn off access to tools for a membership. Also, you can give a specific member (or membership) access to files that are normally only for the admin.
A. You can control which memberships or specific members are able to see pages. Doing this you can turn off access to plugins for a membership. Also, you can give a specific member (or membership) access to files that are normally only for the admin. There are 2 methods you can use to do this. Learn more about file access