If you would like to surf anonymously then here is the information you need..
The most common method that people use in order to hide IP address is to use a proxy server in one form or another. A proxy server is a computer that offers a computer network service to allow clients to make indirect network connections to other network services. You also can hide your IP with Hotspotshield software. But first research more on it.
You can also refer to the link below on the same issue discussed http://www.techyv.com/questions/how-hide-ip-address-free.