Concerning your Original Question:
In a PT6, everything untouched, yout Torque goes down and ITT stays the same, in climb!
Because you are Torque Limited ( that will be the first Redline you hit), until appr. FL170 in a PT6-42 KA200, you will constantly adjust your Pwr Levers to stay at your desired Torque Setting. With every movement of them ITT rises a bit, until hitting your desired max ITT ( most Operators stay below redline).
From that Moment on you dont touch your Pwr Levers anymore ( more or less) and Torque (Pwr) goes down in climb.
All written before is true as well: You have to watch Torque when adjusting rpm ( Rpm down-Torque up-ITT stays) -- When bleed flow changes ITT rises or falls -- When Ice vanes are deployed your torque falls - ITT rises etc etc. You cant set Redline Torque static on the Rwy, because it will rise 5-10% accelerating to VR.
In Jets you set Pwr by N1. And a very good description was made by Whatnext above. With Fadec, you dial in MCP in climb and relax....