MacMini-help with wifi question please

hello. after upgrading osx 10.5.8, time ago, restarted computer keyboard , mouse (wireless). don't remember why unplugged broadband, that's neither here nor there, still somehow able use internet. , way faster own connection. did reading, can't figure out software/hardware have allowed me use else's wifi. plugged in, still wonder it. not use else's wifi, read slows service down , connects our computers somehow. don't want in mine , imagine wouldn't want me in theirs. airport off. blue tooth on son can use ipod touch. bluetooth being on how happened? how set computer no 1 else can use internet? went in sharing , bluetooth on. turned off. mean son can't use ipod touch now? how device "address" , put in there can use it? please forgive ignorance. if there direct link "how to" on subject, happy that. thanks. 1 more thing, using wireless opens being able access device...correct?

mac mini 10.5.8 cable modem, nothing special i'm aware of.


really? 32 people viewed question not 1 can offer help? on mac related website...right?

 

how connect internet? have wireless router?

 

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