IF you give it a spin when you throw it, then it continues to spin, because there is no torque acting on it
to stop the spin.

It's the wheel-spin the car's axle has

depends on the applied load

To counteract the force of torque created by the main rotor. If not for that tail rotor, the torque would cause the helicopter to spin continuously around.

It rotates the rotor. Torque is produced by the magnetic force on the current induced in the squirrel cage. This magnetic force acts as torque on the rotor as a tangential force that makes it spin.