JR Pass Valid Use

Hi ,

I had purchase JR 21 days Rail Pass, but lot of web site claim I cannot use my JR 21 days Rail Pass on the following route, can you clarify ?

1) JR Bantan Line from Wadayama to Takeda

2) JR Narita Express from Narita Air Port to Tokyo, due to all seat are reserve

3) JR Thunder Bird from Osaka to Kyoto

4) JR Oito Line from Shinmo-omachi to Tokyo

5) JR Tokaido -Sanyo line from Oawara to Tokyo

Also may I know if there any luggage locker provided at Omi-Hachiman Station ?

Thanks