Car issue!
 

I own a 2003 cadillac, automatic. I was driving on the freeway when i noticed a lot of white smoke coming from my tail pipe. As i try to exit off the closest exit, my quit accelerating... so i push it to the side of the road and notice it's leaking a brownish/ watery fluid. I have oil, break fluid, maybe?? i honestly don't know, not very car savvy. Anyway my car turns over and i put it in drive, the engine revs, but wont go anyway?? Ideas?