For Question 1, let me point you to: https://innovationspace.ansys.com/knowledge/forums/topic/is-it-possible-to-import-a-custom-surface-in-fluent/
For Question 2, do you mean the Volume Rendering like in CFD-Post? Those techniques are not really available in Fluent post-processing. What are you trying to accomplish? Depending on what you are trying to do, you may be able to do something with Registers and Transparency (scene) to get something similar.
You are navigating away from the AIS Discovery experience