Your iPad’s wifi is disabled and you cannot connect to iCloud but you want to restore it since it stopped working. You can follow these steps:

1. Turn your device off.
2. Hold Home as you connect the USB cable until you see the screen that has an iTunes icon and plug ins.
3. You should see the following message in iTunes:
iTunes has detected an iPhone in recovery mode. You must restore this iPhone before it can be used with iTunes.
4. Restore the device in iTunes.