The brakes my lock up without touching them if a foreign object has become lodged between the pad and the rotors. A failure in the hydraulics may also cause the brakes to engage on their own.
it is normal for it to start only with the clutch in as for the brakes they are probably seized and in dire need of service
If it is an older car without ABS the brakes would lock up and the car would slide/push/unable to steer, unless you got on/off the brakes. With ABS the computer would pulse the brakes and would prevent lock up so you would be able to steer.
Anti-lock? As in "Anti-Lock Brakes"? Many cars don't come equipped with Anti-Lock Braking Systems. If you car is supposed to have anti-lock brakes and they are not working properly, you should have them fixed. You should never drive around with faulty brakes.
Stomp the brakes and steer around the obstruction without releasing the brakes.
Be pointless. The point of anti-lock brakes it to effectively "pump" the brakes for you.
The handbrake?
To maintain directional control during a hard or panic stop. Think about it. If your brakes lock, you go into a skid and lose control of the car. Anti-lock brakes prevent the brakes from locking up, and throwing the vehicle into an uncontrollable skid. This system allows maximum deceleration without having the brakes lock, which, in turn, allows the driver the ability to maintain control of the vehicle while coming to the most rapid stop possible.
Most likely you do not have anti-lock brakes in your vehicle. Other possible answer is that your anti-lock brakes are malfunctioning. If you have anti-lock brakes you should see a mechanic as soon as possible.
because there is a problem with your anti-lock brakes
The driver would need to step on the brake pedal when braking a vehicle equipped with anti-lock brakes. FYI, the driver would also need to step on the brake pedal when braking a vehicle that is NOT equipped with anti-lock brakes. Hope this helps.
Rotors out of round?
Yes