2003 Prius help needed - Car not moving - warning lights on

Hi Everyone, i have a 2003 toyota prius. 190k miles. And it will not engage Drive, Rear wheel. It is starts, and runs. But is very shaky with the transmission on Park. When i iput it in neutral it smooths out quite a bit.

There is a turtle on the dash lights, and now recently it has a triangle with an exclamation point. When i try and push the gas it wont engage. But after charging my lead acid battery in the back it did provide some power to the pedal.

I really hope its not the main battery, if that is the case it might be a good idea to sell or sell it for parts.

Thanks

 

Charged up the battery and it starts. But when i put it on d or r it barely works. Not enough to go anywhere. barely accelerates.

i removed the radiator cap, even when cold the coolant gushes out like crazy. Could this mean a bad head gasket?

i don tknow how to get the codes from the car.

 

It looks like i might need a new head gasket.

The coolant just jumps out of the radiator when i start the car and gushes out. I imagine the top end is warped. Im not sure what to do. I've never done a head gasket. But its worthless to have a shop do it. I see i have 3 options.

Sell the car for parts - cheap

Sell individual parts - will get my moneys worth but very time consuming

Rebuild head gasket - hope it fixes it but very labor intensive and would take me a few days

What would be your choices?