How can I record a verbal or sound to use as a ringtone for specific numbers
I think this is two questions. How do I record ringtones? and How do I get a ringtone for non-contacts? I will address the second. 

You cannot explicitly set a ringtone for numbers not in you address book. But, you can get this effect. Simply make sure all your contacts have a "custom" ringtone set. Then, set your default ringtone to something else. You can do this with only two ringtones, one for contacts and one for the non-contacts. Or, you could customize your contacts as much as you want. Just make sure that every time you add a contact you give them a rintone other than the default.