Without a model number I can't give you an exact price of the control panel for your range. The usually run between $40.00 and $80.00.
The F1 code indicates the electronic oven control (EOC) has detected an over temp condition in the oven. This can be caused by an oven temperature sensor or the EOC.
We can't test the EOC but we can test the oven sensor. To do this turn the power to the range off and remove the panel that covers the controls on the rear.
Disconnect the plug on the EOC that has 2 violet wires in it and read the resistance between the violet wires. It should read between 1000-1200 ohms at room temperature. If the oven sensor checks within this range the EOC is bad.
If the resistance is out of range take the lower panel off the rear of the range and disconnect the violet wires from the plug that goes to the oven sensor. Read the resistance of the sensor. If it is still not within the range the sensor is bad. If it measures within the range the problem is in the wiring from the EOC to the sensor.