To identify where a leak is coming from, slide a piece of cardboard under the car and check it after a few hours. Keep in mind that many leaks only occur under pressure at highway speeds. Brownish-black oil is either engine oil or steering fluid. A thick black ooze might be manualtransmission fluid. A reddish, oily film is probably automatic transmission fluid.
Coolant is generally green, pink, or yellow.
Air conditioning discharge is clear. All right, all right. Do not taste any automotive fluids or let any fluid touch an open sore or cut.