How would you measure and display temperature? Please help.

Projects General Guidance
2

Get a couple of these:
https://www.sparkfun.com/products/13266

And break up the project into several steps.

  1. Get a temperature printed to the serial monitor.
  2. Decide what display you want to use
  3. Get something to display.
  4. Display your temperature on the display device.

This is all well within the Arduino's capabilities.