visit Kuala Lumpur

Hey Guys! how are you?
i'm from Jakarta, Indonesia. i will be in Kuala Lumpur next week and i planned to visit the Batu Cave. i will stay in Bukit Bintang area. how is the best way to reach Batu Cave? can i use the train from KL Sentral?

and also i'm wondering is there any beach area around Kuala Lumpur?i've read about Port Dickson..is it far?

would very appreciate for the info..thank you very much :)

Cheers..