Go to any ptc site or just Click Here to have a direct example.
When you click the "Register" link you will see the page like this(depend on the site you are joining).


Fill the need information then click Register.
Put your Alertpay mail address on "Payment address" in some site it is "Alertpay address" or "Payment Address"
After you finish register you can now login.
After you login you're account you see the page like this.


Now click on the Surf Ads to start earning money.

Do not cheat
Do not try to cheat (multiple accounts or autoclickers). Probably you will see your account to be banned. Autoclickers also may contain viruses.

To join PTC sites click here.