No. Sony NS-WS623 does not have FM radio.
Sony WS623 has 4GB internal memory and you can further expand it up to 16GB with the help of MicroSD card.
No. It does not have remote control.
Yes, you will get a pair of normal earbuds and a pair of swimming earbuds.
Hold down the button (1) for 3 seconds.
You will hear the shutdown sound. Then, the Walkman and the lamp ( 2 ) will turn off.