The way out

How to get out?

Heavy spoilers of season 4 finale:
The dialogue between BIW and MIY in the latest scene declares that they need both Bones and Bottle Tree to be able to solve the puzzle, and MIY threw all the talismans to another bottle tree therefore the talismans are also needed.
So I think the sequence of solving the puzzle is like this:
1- dig out the bones from their grave
2- use the talismans to travel back BEFORE the original sacrifice ritual
3- save the children in their timeline
4- break the loop and everyone including the original folks and every person from every cycle will be free simultaneously, because the cause have been removed so there will be no effects

About teleporting I am 99% sure that the original ritual created an encapsulated time-space dimension in which everything is happening simultaneously and trees are wormholes, the intersection on the infinity sign, they just reset everything getting into them, creating infinite loops(Boyd’s ring). I have other points and connections between different clues but it’s hard to put them all together in a reddit post. Just wanted to share thoughts