One baggage only.
The gas tank has limited the size of the back truck. At the same time, many taxi drivers have put some tools in the back truck.
Most drivers will NOT allow the baggage to be put in the car. Due to the size, the only place is putting the baggage on the seat. Since the wheels can damage the seats, drivers will not allow and can refuse transporting you legally (as taxis are designed to transport people, not baggage).