Which is the one I can take to travel overnight from Kyoto to Tokyo?I think the pass is supposed to be valid on any JR bus between Kyoto and Tokyo, especially on the "Dream" and "Seishun Dream". I think it should also be valid on the "Premium Dream" buses, but I am not 100% sure.
Do I book and reserve the tickets in the same way as I reserve the JR tickets?
Yes, the JR bus tickets can also be reserved at the ticket counters of JR stations.