other costs and trains I can use

Hi there,

Yes, it is possible to use the Japan Rail Pass between Narita and Kyoto. For your journey, the only train you'll not be able to use is the Nozomi Bullet train, all other Bullet trains (Sakura, Hikari, Kodama) are available for you to use and all other JR trains and buses.

Here are JR itineraries for your legs:

• For Kyoto > Toyama: http://goo.gl/A0Kps
• For Toyama > Fukui: http://goo.gl/UAwJd
• For Fukui > Tokyo: http://goo.gl/tmGui

For your Rail travel there are no other costs than the initial price of the pass and there is no limit to the number of trains you can travel on during the validity period.

Enjoy Japan!