to clarify the motor turn count question, the Turn count of a motor refers to the amount of winds of copper around the armature of the motor. Lower turn counts generally mean more power, lower torque, and higher RPM capacity but they need a lot of current to spin. Low turn motors are more suited for lighter chassis and smaller tires (road course cars) but are not exactly limited to those.
The fact that TJ's motor is brushless lends the idea that the motor is lower maintenance and more efficient (brushed motors need their brushes changed after time and contain more parasitic loss in power). The lithium polymer batts also mean that there is no cell memory like there would be in your nickel-metal hydride and nickel cadmium so you don't exactly have to worry about cycling your batteries. LiPo's also tend to keep peak performance until almost fully discharged where NiMh and NiCd batts linearly lose power throughout discharge.
I wish I could help ya more TJ but good luck with the sale. I always think about getting back into the hobby but I've got too much on my plate.