Dell :: Inspiron B130 Wireless Si Or No

I purchased a "slighty used" Dell Inspiron B130 2006 model laptop, which runs with windownsXP. Before I bought it, the guy told me it was "wireless" already and that I could go to any place like "starbucks" etc. and use the internet. Well, we met up at a local place that I knew would have wirless there, and once he arrived, he said that the wirless works, I just needed to go out and buy a card to go into it. Well this upset me bc as I understood it, I didnt need anything else(this is obveously my first laptop, which I paid $320 for). I have even tried hooking it up to my at home cable internet, and it doesnt work. On the laptop it says the Network Adapter is Broadcom and gives a location of PCI bus2, device 3, function 0. Ive tried playing with the network connections, and still dont know what I need for it. My friend came over with her laptop, and a whole bunch of my neighbors have wirless routers, bc her laptop worked everywhere in my house(she has wireless). I went to Target and bought a Lynksys Wireless G notebook adapter(bc it says it interoperates with wireless-B networks). Well I went through the software, and when it said to put the card in, I took the Dell plastic piece out and tried to put in the lynksys card...wouldnt fit. I took a flashlight and saw that the shape of my cardslot is like an "L". I went on the internet and found that I would need some sort of expresscard54 or 34, bc dell made this differant than other notebooks.

All in all, this Lynksys one wont work, Ive tried calling Best Buy and they put me on hold for like 30min.s then hung up on me, called dell, gave them the system code and they told me the laptop isnt under warranty anymore and they couldnt give me any info as to where it was bought or anything. Bottom line, I need to know how much more it will cost me to get this supposedly "wireless already" laptop to actually work.