There is no default password. You do not require to use password to connect with Samsung HM1350.
To connect Samsung HM1350 with your smartphone, please follow the below steps.
01) Make sure that your smartphone's Bluetooth is switched ON.
02) Switch ON your Samsung HM1350
03) Now search for the visible devices on your smartphone
04) select Samsung HM1350
and you're done.
Yes, It does have.
Yes, It comes with pair of ear hook.
No. It has support only for voice calls.