1. In the frontend adding form there is no editor available for the field description.
At admin area editor available? At frontend we use the same functionality like on backend, and if in Admin Area editor available, it should be available at frontend.
Please check editor settings, If you use standard Editor - TinyMCE make sure it Enable
2. How to change owner of the property?
We don't provide function "change owner of the property" Before we never have request about this function from our customers.