wireless network card and factory restore

I was wondering what kind of card to buy for a better connection to the internet. I'm not sure but I was told that a card came with it from the lady i bought it from but there isn't one to stick into the side of the laptop lol i'm not an expert as you can tell. also this lady didn't include the cd for restore it to factory settings i don't think because i am unable. also this lady is out of the paper so i don't know how to get it transfered into my name for dell to send me another restore cd. help help help