Using JR Pass

Hi.

Need suggestion - We will be arriving in Osaka on April 30. We will be purchasing the JR Pass 7 days - Ordinary not Green.

1. We will be taking the Shinkansen Train using JR Pass on May 03 from Osaka to Tokyo.

2. Should I need to make a reservation due to the "Golden Week" in Japan. Do JR pass holder allow to reserve the date and time ahead to avoid the long lines.

3. if we arrived at Tokyo Station - how will we proceed to Century Southern Hotel? What should we use Train or Bus.

4. On May 4, we will traveling to Gala Yuzawa for ski resort since it is also "Golden Week" do JR pass allow to reserved the time and date ahead to avoid long lines?

5. How to go to Disneyland from Century Southern Hotel using JR Pass.

Thank you.