Are second and third floor apartments always more expensive than first floor apartments?

Answer 1

Not necessarily. It depends upon many factors. Walk-ups are usually a bit cheaper due to the climb, though a 2nd floor apartment may be a tad more secure than a 1st floor one. Also, an upper floor may offer a better view and that could command a higher price. It's just not possible to say, each property would stand on its own merit.

Answer 2

Not always. It depends on the location and the landlord. Some landlords charge more for the first floor because it's easy access and probably a private entrance. It all depends on the circumstances.