I would expect $100-150.
well a thermostat is between 5 to 15 dollars and they will charge one gallon of antifreeze (about 9 dollars a gallon) and probabily about an hour of labor. so it kind of depends on how much they charge an hour.
Replace Alternator
A new thermostat is like 10-15$ and very easy to do. Get a new thermostat and thermostat gasket and just look up how to do it for your vehicle. Mine was three easily accessable bolts. Unsctew pull out old thermostat put back together and burp system. [get air out] just look them up. Very easy. Save a couple bucks.
POA93 = Inverter Water Pump Failure. Take it to a Toyota dealer as they will replace the pump free of charge.
it depends on your skill and the facilities you have to work with. if you came to my shop we would charge 3.2 hours to replace it.
Depending on quality of radiator and charge per hour, I would say $200 at least.
You don't have to but it would be wise to do so since the thermostat sits on the water pump anyway and only costs around $10-15. It ends up saving you another labor charge down the road because the hoses are already disconnected and it's a simple job that way.
I think that was the same problem as I had. If your Corolla is under 120K this problem will be covered. Just take it to your closest Toyota dealer and they should replace the ECU for you at no charge.
Charge it, replace it,test the alternator,Charge it, replace it,test the alternator,
It should cost between $475 and $550 depending on the labor rate of the shop and the actual parts cost.
alot of shops will charge 150 or so...but if you have the most basic of tool sets.... anyone can do it. unscrew the coupleing where the top radiator hose is...pop old one out drop new one in replace hose.
Your iphone should have a warranty on it including the charger. So go to an apple store and use the warranty to replace it.