General rules defining the driver's behavior in the event of a breakdown or accident, providing first aid

When looking for the persons who might have been injured in a car accident, should you check all spaces of the crashed car, including the car boot?

Are you allowed to switch on emergency lights when you are driving a hauled vehicle?

Is it fully justifiable in the presented situation to check if the accident perpetrator had applied emergency brake and turned off the engine?

Can you use emergency lights while towing a vehicle?

If you're involved in an accident on a motorway, are you obliged to signal the fact that your car is immobilized by placement of a warning triangle 100 m behind the car?

Should you signal the fact of parking a broken-down car on an area excluded from driving?

In the presented situation, are you obliged to signal the fact that you have parked a broken-down car on a road which is not an express road, if the car may be seen from a sufficient distance?

If you park a broken-down car outside a built-up area, are you obliged to place a warning triangle immediately behind the car or on it?

In the situation that you see here, while you park a broken-down car on the road outside a built-up area, are you obliged to place a warning triangle behind it at a distance of 150 m?

If you're involved in an accident on a motorway, do you have to signal the fact that your car is immobilized by turning on the emergency lights?