That set of gauges hasn't been standard in decades. RPM is pretty meaningless in the Prius because at any point the engine can not be running while the car is running on batteries alone. Also with the kind of transmission it has, there is no way for you to shift gears--for that matter, there is no such thing as shifting gears.
Knowing the RPM won't do you any good in the Prius. For that matter, neither would knowing the exact engine temperature or oil pressure.
But if having these gauges was so important to you, and knowing before you bought the car that it doesn't have these gauges, why did you buy it?