Tokyo Wide Pass is currently sold as Kanto Area Pass. This pass will be remodeled and will be sold as Tokyo Wide Pass on December 1, 2015. It covers Tokyo and surrounding area, such as Mt. Fuji, Izu peninsula, or Nikko. Echigo-Yuzawa will be covered by Tokyo Wide Pass but it is not by Kanto Area Pass.
I visited Tokyo Disneyland and DisneySea with my daughter who just became 6 years old when she was there. It was the first time to visit there in last 20 years for me. I did not remember about the last trip 20 years ago. And also it was the first time to visit there with small child. So I was almost the first timer almost, maybe same as you.
I usually talk about train trips and other transportation in this website. But I have learned many things about Tokyo Disney Resort (Disneyland and DisneySea) as “the first timer”. Even though I am not the expert of Tokyo Disneyland, I believe the things that I have learned will help you to prepare and build the plan to visit the wonderland, Tokyo Disney Resort.
Tokyo station is the biggest station in Japan. And most of you use this station to get on Shinkansen, Narita Express or Tokyo local trains. But this station is very complicated because it is too big and too many platforms.