How many p's of air conditioner is this? What is the approximate cost of installation? In a first floor rental house, in the Whittier area of Whittier?

It's a one-horsepower air conditioning unit. 23 would stand for 2300 calories.

And it's a heating and cooling air conditioner because it has R in the number, which means heat pump, which stands for heating and cooling.

Installing an air conditioner is usually not too expensive, 150-200 is enough.