Are the stairs the only way to get to/from there? There is a road going up, honestly I always go by vehicle, car or motorcycle.
How far of a climb is it? I don't know how many steps but it will take 10 minutes walk up if you are in a good condition!!
Is it reserved for only people practicing that faith or can anyone go up there? Everybody can enter the temple but wear polite clothes, special for the ladies. And there are places where you have to take off your shoes.