Day trips to Nikko

I will be staying in Tokyo and plan to visit Nikko with JR Pass. I'm planning to take 2 trips to Nikko...1 for temples/shrines and 1 for waterfalls/lakes. What are the admission tickets I have to purchase for the various attractions if any?

You can find admission fees in the following Nikko sightseeing guide:
https://www.japan-guide.com/e/e3800.html

It's a pretty long train ride (2+hrs each way). Any possibility to stay overnight? I think you will have a much better experience without an extra 4.5 hours of train trips in the middle.

Suggestions noted. Thank you

2-hours each way is not longer than many other day-tips regularly suggested on this and other forums. But doing two trips to the same location does add-up and it gets tedious pretty quickly doing the Nikko trek often.

I�fve done Kegon Waterfalls then some of the main temple/shrines in one day trip from Tokyo, though we started early.
But if you want to go see other waterfalls above the lake, then you�fd want two days (preferably with one night stay either around the lake or in Nikko city itself).