It should be red to dark maroon if it's brown or a yellow color it is burnt and should be changed
I would imagine the fluid would go to a disposal site of sorts, mine goes to the waste facitlity in town.
Oh man not good, brake fluid eats paint and its very toxic where it will eat up your rings and damage your tranny guts if you have done that drain it asap, other then that they are very different...
No, and do not mix. They are different viscosity and different type oils
no plain and simple.
Yes you can just make sure it's a dot 4...