Your profile password is changed from My Account page - My registration information.
You can control the Alerts you receive from the site. Activate necessary site emails from My alerts section and save. If you activate any, the alerts from the site will come to your email address, listed for your account on a site.
The whole information about your account is kept in a special section at My account page - My account status. There you can see your current membership group.
You can cancel your account at anytime in My account section under My profile.