Hello,
If the only wireless connection you have is Bluetooth, you are not going to get any type of internet connection.
Bluetooth is a technology that was designed to connect computer peripherals together at a maximum range of 30 feet. Bluetooth is most commonly used today in the form of those little headsets that you see people wearing while they talk on their cell phones. It is also used in computers for wireless mice, keyboards, headphones and related equipment.
In order to connect to the wireless internet, you must have a 802.11 compliant wireless card installed in your laptop. There are currently 3 types of 802.11 compliant frequencies that carry different speeds of data. 802.11a, 802.11b, 802.11g. There is also a new one in development called 802.11n. Most wireless internet access points utilize b or g. G is the faster of the two.
Some wireless network cards are external and others are internal. Most that come with new computers are internal and can communicate with both a and b frequencies if not a, b, and g. You will know if you have an external card because you have to physically insert it into your computer to connect to the internet.
Before you try to find a wireless access point, make sure you have either an internal or external wireless internet access card. Bluetooth does not enable you to connect to the internet.
That being said, before you leave home, you can usually find a listing of wireless "hotspots" as they are known by searching through Google or through local search engines for your area. Many places are broadcasting free signals. Starbucks, while a nice place to sit, is not free. They utilize T-Mobile and charge roughly $30 a month to use their service or a daily fee. Then again, if you are travelling a lot, this might be good for you. But, if you are travelling all the time, I personally would recommend you sign up for a service like Verizon's where you can get broadband wireless access anywhere you want for a flat fee each month. It requires an extra hardware card but is worth it.
I personally never pay for internet service. I use other people's unsecure networks. I locate these by using a wireless network locator and signal strength meter that you can pick up at Circuit City for about $45. It tells you how many wireless networks are in the area, whether they are encrypted, and how strong the signal is. A definite improvement over taking out your computer, booting it up and wandering around the place with a laptop in hand. If you decide to take this route, follow proper netiquette and never try to hack the users network, download illegal materials or compromise their security in any way. Leave no footprints.
I listed a web address below. I use it for pretty much and random question like this. Type in Bluetooth and Wireless Internet Access to see how it all works.