Hey does anyone know where I can find a script such as this one?
https://www.webquick.com/order_form.php

like how when you add more pages, the cost goes up by a fixed amount, and then when you submit, it goes to your email? Thanks.

To submit the form you can use the mail() php function.

http://us.php.net/manual/en/function.mail.php

Making the pages go up by a fixed amount is best done with javascript or ajax. Try posting in one of those forums.