DO I START BAKE FIRST, THEN COOK TIME?
Not sure what you're asking. Can you elaborate?
Almost every recipe I see says preheat your oven to a certain temperature, then put in the food and then set the timer.
If you are asking about digital settings on your stove/oven - I'd suggest getting the instruction booklet out or googling your specific model. But generally speaking, if that IS what you are asking, you'd set bake, then the temperature. Once the oven is up to temperature, you'd set a time. And I just realized you may very well be asking about a microwave - so I again send you to your instruction booklet or google.
Salt and Peppy
First, you preheat your oven. Then, you put the food into the oven and start the timer.