How to get to Tobu Zoo?

Searching google and forum here, I can't find the way to Tobu Zoo. There's a Japanese Web site for Tobu Zoo but I cannot read Japanese.

I'm going from Asakusa to Nikko to spend 3 nights there. I'll spare 4-5 hrs in the themepark before I go to Nikko. I plan to get some of those Nikko PASS.

1. Is Tobu Zoo on the way to Nikko?
2. How can I get to Tobu Zoo from Asakuza?
3. Will Tobu PASS cover the ride to Tobu Zoo (if on the way)?

Thank you very much.

Is Tobu Zoo on the way to Nikko?

Yes, near Tobu Dobutsuen Station.

2. How can I get to Tobu Zoo from Asakuza?

By Tobu Isesaki/Nikko Line:
http://www.jorudan.co.jp/english/norikae/

3. Will Tobu PASS cover the ride to Tobu Zoo (if on the way)?

No. The Nikko free passes do not allow you to get on and off the train between Tokyo and the Nikko area.