Internet Question Touch Pro 1

[disord3r]

Hey fellas just bought a touch pro one about a week ago. This phone has wifi capability on it which I'm sure all of you know. Anyways I was wondering if this means you get free internet by using wifi rather than going through sprint's tower. They said I would need to put a data pack add-on to my current plan if I wanted unlimited free internet. I don't know if thats true or not since the lady barley spoke English. She just said its to boost the connection I believe. I was also wondering if the wifi isn't free is there a way I can get around it without having to pay?

Thanks in advance.