Glenn is correct when he says that torque causes the aircraft to turn when full throttle is applied SUDDENLY, but it's always to the left. Propeller(s) turn clockwise (when viewed from the rear), which attempts to induce a roll to the left (counter-clockwise), but this is not likely while still on the ground), so the result is a tendency to yaw to the left. A bit of right-rudder during the takeoff run is normal.
Because of the tremendous torque generated by the Allison or Rolls Royce engines and the huge propeller, this was a significant factor with the P-51 Mustang. It was no problem at all with the twin engine P-38 Lightning because the engines turned in opposite directions.
I disagree with Glenn that weight distribution is a factor. Two 400-pounders in the right seat would make no difference while the plane is still on the ground. After takeoff, at crusing speed, any tendency to roll to the left would be corrected by a slight amount of right AILERON trim. Setting rudder trim to "neutral" may also be necessary.
Most of my flight simming is done in helicopters (nearly 2 dozen in my "fleet"). If you think torque is a problem while still on the ground in a Cessna, you might want to check out the significant action/reaction characteristics of a helicopter. Unless it's a Chinook (with counter-rotating twin-rotors), that big overhead "propeller" generates a LOT of torque which must be controlled with the "rudder" pedals.