Newbie help. How to get started with wireless internet?

hello.
i am new to mac. im planning on switching by purchasing a MacBook Pro for my freshmen year in college.
i was just wondering if the MacBook Pro already has the equipment i need to have wireless Internet. what do i need to purchase along with my MacBook to have wireless Internet? i read about AirPorts but i don't understand it. i need to buy something separate to have wireless Internet?
also i am new to wireless Internet. i have dsl and my friends told me all i need to do is a wireless router. can someone shed some light on that area as well.
thanks!

Hello there:
When you go up to your Airport signal menu, located on your menu bar on the right side, it will list the available hotspots that are within wireless range. Some indeed are free. Select it, go to your browser and you are good to go. Some DO require subscription to access. Generally what happens with these is that you select the network, and then your browser will take you to a registraton page. You can then pick an access plan and pay with a credit card. The registration page will tell you what locations carry that plan. For example, there is one company that runs hot spots in all the major airports... you subscribe, and then whenever you are in an airport, you can access the web.

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