Check with your local recycle center, I know the one in my area of the PRK takes coolant and other hazerdous waste, no questions asked.
Not so legal method's:
Not that I would know anything about this, but for ATF, I have heard of people mixing used motor oil and ATF, looks and smells like used motor oil. For coolant I have heard of people dumping it down the toilet (animals like Coolant and it is toxic, so it should never go down a storm drain).
brake fluid burns really well, and a funnel, a pipe with a tap, to drip feed atf means atf also burns really well...
Our local tips take up to 20 litre container of waste oil for free, and BF ATF etc can be mixed in, they dont check the contents, you just pour it in a trough which goes into an underground storage tank, which they get pumped when full.
Give it to someone with a land rover/discovery/rangie. Their vehicle will dispose of it automatically over the next few miles... That's their advantage, never have to change fluids - just keep topping them up
Mix all of it together with used motor oil...and take it to
[glow=red,2,300]It is FREE[/glow]
Every autozone store has a used oil recycling tank in the back where they store their inventory. They just take the bucket...ask for your address and pour it in. (they only ask for your address for marketing purposes..but they wont recycle your oil with out you providing it).
I have been to about 6 differrent autozones to drop off oil/tranny/brake fluid..3 of the 6 didnt even ask me for anything..they just told me where the tank was and i poured it in myself and left..they other 3 had one of their employees take it from me to dump in themselves.
Easy..and you can pick up a nice set of fuzzy dice and a "NO FEAR" sticker at the same time..
Take it to the store you bought the new fliuds from - they are supposed to accept it. I have run into shops that refused saying it was obvoiusly "contaminated" - those shops usually recieved a "little present" on their front doorstep the next morning accompanied with me never doing buisiness there again. YMMV.
My local independent Audi wrench uses used oil to heat his shop. He appreciates the oil and ATF as long as I'm carefull not to contaminate it even with spray solvents, they clog up his oil heaters. The city told them antifreeze and brake fluid are no problem for our sewage treatment plant. There are a lot of businesses cropping up that collect used oil and sell it to processors, pretty good money I've heard.