So my dad got this phone but he doesnt want it anymore so he is giving it to me. However, my plan does not have data and im not planning on getting any so I have some questions

1) What kind of features will/will not work. I noticed that the CoPilot GPS can preload maps but how good is the GPS without data? (My C905a does within 800m with Wi-Fi -.-)

2) Rooting the phone allows me to use apps not from the Android market right? Whats the risk of bricking the phone? And if I break it, what cost will rogers or any other trusted place repair it for?

3) Do most Android/other apps work without data/wifi.