URGENT!! PLEASE HELP my prius gen 2 won’t start

You have codes you'll need to read the codes with a capable scanner to get the codes That's the first thing that needs to be done before you do all the button pushing and everything else If you push the button right now like you're going to start the car what lights remain after it does not ready so you don't see the green ready but you see traction control skid control ABS red triangle? Any of them take a picture maybe it's better.

 

beeping usually means brake actuator

 

There is a beeper for the brake system if the pressure gets too low to assist your braking. But it is not the only thing that beeps in the car, and I don't believe it prevents the car from starting.

The Gen 2 repair manual probably has descriptions of the flash patterns seen here on the dash display and the power button, as well as for whatever trouble codes can be collected.

Toyota Service Information and Where To Find It | PriusChat

 

You've posted to the Generation 1 forum, and your question relates to Generation 2. Suggest you move to that forum for more replies.