Just take Jungfrau travel pass and you can travel all of Jungfrau region for free. Price 190 swissfrancs. For top of Europe you pay 75 swiss francs extra. Any questions, happy to help. 😊
I am surprised to see you need a tour guide for trip to Switzerland. Common guys, its not that difficult to tour around Interlakken, you just have to hop trains and its way cheaper 😊