I use TOAD for Oracle 12.9 on my work computer. In addition, I have an “emergency” notebook which is only turned on if my work pc malfunctions. This notebook has TOAD for Orcale 12.9 installed as well. For this scenario, do I need two TOAD for Oracle licenses?

Yes, Quest requires a separate license for each use of the software on an “individual computer”. Accordingly, there is no second-use-right available for this software.

Quelle: Quest (DELL) Product Guide 2017-09-28