If only for less than a day, can buy light train ticket from vendor machine at mrt/lrt/monorail counter. If dont have loose change, vendor machine can accept rm1, rm5 and rm10 ringgit currencies. Or go to counter and exchange. But only local currency and not foreign currency. From KL sentral you can take lrt direct to klcc, 5 stops only.
You can take klia express from airport to kl sentral. Cost around rm60. Kl express can accept most overseas credit cards. If you only here for under 12hours, not need to save penny and lost your pound. Can exchange rm100 to rm300 at airport. It wouldnt break your bank. You can use yr credit card to withdraw money from atm machine at airport.
KL sentral has luggage storage facilities, both at klia airport or kl sentral airport checking counter near there. Actually you can check in your luggae from bangkok all the way to your final destination. You just pass malaysia immigration with carry out suitcase.
Duty free cigarettes - if you depart from taiwan and would like to buy duty free cigarettes into malaysia, RIGHTFULLY the duty free shop in taiwan will inform you they cant sell this to you already. Individual package of cigarettes from yr country can bring into malaysia, no issue as long as its for personal consumption.
Carry-on luggage is a big problem I guess~ Basically, it’s better not to bring cigarettes............................. Smoking less and staying healthy HAHAHAH ~
Fast or slow passing migration depending on which airport (klia 1 or 2) and timing of arrival You arrived at klia 1, less travellers. Go try and see klia 2.....and you will see sea of people there