I have an iPad 2. I just bought an iPad 4. I upload my iPad 2 to my iCloud and now need to know how to get it to my iPad 4.

If you're asking how to restore the backup of your old iPad to your new one, first make sure your new iPad is running the same version of iOS or here as the your old one. If not, update it first. Then go to Settings>General>Reset, tap Erase All Content and Settings, go through the setup screens on your new iPad and when given the option, choose Restore from iCloud Backup. Be sure it's connected to wifi and your charger as it might take a while to finish.