I have just bought the new ford electric car that supports internet connectivity through Bluetooth. when I use the app Foxfi. I am not able to turn on the Bluetooth tethering. When I tried to root the phone I was unsuccessful. I was able to unlock the bootloader, but not to root the phone.

1. Is there a way to root the phone without unlocking the bootloader as it is done on the photon 4g ? I have the latest version of HTC software dated 7/13/12.
2. Is there a way/app that can do Bluetooth tethering without rooting the phone.