Problem 1: very likely you need to add a Navigation Mesh to your level. Teleportation from the standard VR template relies on a Nav Mesh to determine where you are allowed to teleport to.
Problem 2: it is definitely possible, but I cannot be more specific since I don’t know the template you are working with. In principle you can Migrate the MotionControllerPawn (and its dependencies) from the VR Template to your template, add a Nav Mesh to handle teleportation and you are ready to go.
Give it a try and post again here if you need more help.