I run Torque with BT or USB, there's no special cable other than the OBD2 USB cable ($30 for the NON ****ty made ones). I've e-mailed Ian (developer of Torque Pro) many times and he is VERY helpful. I can try to help as well, Is your Android device paired with the BT adapter before you open Torque? If you choose to go USB you'll need Torque Pro (paid) Torque (Free) won't work with USB.
I used to run Torque Pro via BT on my old Droid X, now I have to run USB OBD2 to run Torque Pro on my head unit, as the head unit doesn't support OBD2 BT. The Elmscan 5 works great with Torque PRO, but I opt'd for the OBDLink SX and noticed no difference, lol. To connect the USB cable to a tablet, you may need an OTG cable, but they are far from expensive and is not a problem with Torque Pro. TouchScan, Dash Command, OBDLink, they all would need the cable to connect to an OBD adapter.