Located in the suburbs of Kuala Lumpur, to reach it you need to climb up the 272 steps. If you are a fit and healthy individual the 272 steps shouldn’t pose a problem.
From Kuala Lumpur you can take the bus #11 from Bangkok Bank bus stop (not that far from Central Market/Pasar Seni). After one hour or so journey, watch your right side closely because when you start to see some limestone hills you are already close to your destination.
I don’t remember paying an entrance fee to get in. Don’t forget to bring drinking water, and maybe some snacks too but keep ’em inside your bag. There are hordes of monkeys in the area and you will see it immediately once you start climbing up, so be careful they may snatch from you anything interesting to them.