Blue Tooth and wireless / WiFi are not the same thing.
What Is Bluetooth Technology Used For? http://www.ehow.com/about_5167346_bluetooth-technology-used.html
What Is a Wireless Card for a PC?
Read more: http://www.ehow.com/about_5244771_wireless-card-pc_.html#ixzz2Ymk1FO76
If your computer does not have a wireless card built in then you can purchase a USB or card type wireless adapter install it and the software that comes with it and set up a wireless connection to a home wireless network or to any free wireless / WiFi hot spot.
You can purchase a Blue Tooth adapter install it and the software onto any computer that does not have Blue Tooth built in.