questions about JR PASS

Hello Daniel san,

We are about to travel to Japan and arrive in Osaka, then we'd like to travel to Tokyo from Osaka by take the Osaka-Tokyo Hokuriku line with JR PASS ticket. I got couples of questions on JR PASS could you help to clarify.
1. Can we take the train to Tokyo from Osaka at ANY time during train's running time without pre-booking if we have the JR PASS tickets?
2. is JR PASS also available for the SUNRISE train?
3. does it need additional charge aside of the JR PASS ticket to take the JR train ?

regards,
Okian