Coolant leaks in 2005 Toyota Sienna

It would have been lovely to have a trusted independant garage to take the vehicle to, but I don’t & I didn’t. The repairs are done, rightly or wrongly. My past experience with independant garages has been such that I swore off of them years ago. I’ll start asking around & see if I can find one I can use the next time something goes wrong. Or, I may just drop-kick this car to the curb & try to find something more reliable. I’m pretty disgusted about the whole experience.

I’m really interested if anyone can answer the questions I posted above. Could the leaks really have developed this fast with no symptoms? Is there anything I can do to detect a coolant leak before it turns into three expensive ones?