WP User Profiles is a sophisticated way to edit users in WordPress.

• Download and install using the built in WordPress plugin installer.
• Activate in the "Plugins" area of your admin by clicking the "Activate" link.
• No further setup or configuration is necessary.

Yes.

Yes. There are a filters you can use to add or remove sections and their metaboxes.

The WordPress support forums: https://wordpress.org/support/plugin/wp-user-profiles.

Yes, please!