Connecting multiple custom telemetry data in mission planner with custom screen


I am using the pixhawk on 2 IC engines and I need to see a lot of data in mission planner like, 8 x thermocouple temperatures and 2 x rpm signals. I looked through the documentaion and there are rpm sensors listed but I will not have enough pins to connect everything I want to connect. Any ideas?

I would also like to create a custom screen so that I could see all the data on one screen in mission planner.

Thanks for your help in advance.