The issue is that you need the proper service books and a BB data plan to use BB related services, the BB browser, BBM, email, etc. Unless you have those, your BB experience will only be marginal at best.
For WiFi help, please use our SEARCH feature and read our FAQ. That is where to start.
Maybe this will help:
How do I set up Wifi on the BlackBerry? - BlackBerryFAQ