Mani Admin: There are many reasons one would consider becoming an admin, the first is because admins are respected by the smart people on the server, given many commands to punish Arseholes, given personal gain commands so they can give themselves money or weapons, they get a nifty command called hook mod and also they get to add me to their friends list
WCS Admin: With this you can share your generosity with the server by giving out free levels or money, you could also keep it for yourself and never give it anyone and be the highest level on the server.
Commands: All commands can be found here
http://www.mani-admin-plugin.com/mani_admin_plugin/documentation/mani_admin_commandnames.htm or you could always just buy admin and consider it a lucky dip
. Just type Admin and WCSadmin to see what commands are available for current admins.