You can check the remaining amount of consumables of this machine from the Web page of this machine.
About the IP Address of this machine
Setting an IP Address from the Operator Panel on This Machine
How to log in to the Web page
Click [Status Window] while you are logged in as the administrator, and you can easily display the status of this machine.
You can check the remaining amount of consumables of this machine from Configuration Tool.
Using Configuration Tool (Windows only)
For Mac OS X, you can check the printer status from [System Preferences].