1. Where do I take the elevator from?From near the Lake Chuzenji bus stop.
Is the ropeway 2-way?
Yes, you can use it in both direction. In fact, most people use it in both directions, although it is also possible to hike between the top station and Lake Chuzenji.
How much does it cost?
A few hundred yen.
3. How do I get back after taking the ropeway?
The ropeway is located at Akechidaira, which is a little bit away from Lake Chuzenji. You best visit it along the bus ride from central Nikko to the lake.
Is Ryuzu Falls worth visiting?
Not really in late November. It will be a waterfall surrounded by barren trees. Still nice, but not necessarily worth the effort of going there, unless you are using a rental car and drive by anyway.
Also, I'm going in late November and would like to know how's the climate condition at Nikko.
The average daytime high is only 5 degrees at Lake Chuzenji. The temperatures fall below freezing during the nights, and there is a chance of snow. In central Nikko, it is a few degrees warmer.