timer circuit with added sounds

I need to create a timer circuit, 66 seconds would be the max time, it should be able to increase or decrease in intervals of 1 second when setting the time to count down. while counting down i would want to be able to add more time manually, a display would be added to show the time.

after the timer reaches zero then I would want it to sound like a roaster, not sure if thats possible.

I also want to make a buzzer but when I press the button it should sound like a dutch pot cover.