This is a member forum and not Apple so replies are made by other users just like yourself.
Here's some info that might help you.
If you don't have access to any of your other devices that are using iCloud Keychain, you can still set up iCloud Keychain on another device if you have these items:
- Your iCloud Security Code
- The device that is using the SMS-capable phone number you provided when you first set up iCloud Keychain. A verification code is sent via SMS to this phone number. If you don't have access to this number, contact Apple Support, who can verify your identity so that you can complete setup on your new device.
If you have these items, follow the iCloud Keychain setup steps documented above. Your iCloud Keychain will then be pushed from the cloud to the new device.
If you have more questions, they are probably already answered here: http://support.apple.com/kb/HT5813