We are fellow users here on these user-to-user forums, you're not talking to iTunes Support nor Apple.
They are there for account security, to try and prevent other people making purchases on your account if they get your id and password.
You can go in and reset them if you had put a rescue email address on your account - the steps on the HT5312 page that you posted from will give you a reset link on it.
If you hadn't put a rescue email address on your account then you will need to contact Support in your country to get them reset : http://support.apple.com/kb/HT5699
When they've been reset (and if you don't already have a rescue email address) you can then either add a rescue email address for potential future use, or if it's available in your country you could change to 2-step verification : http://support.apple.com/kb/HT5570