What to do, my daughter and I are Stranded on the roadside?, What happened to the Car?

I was driving north on highway 71, and the transmission started acting up, and it was like "slipping" into low gear. In Carroll Iowa I stopped into one of those " fundraiser" car washes, and I told them that I don't know anything about the underhood components of my car, and that I am just a single mother heading north to Bemidji.
The one washer said, "your low on transmission fluid". What the heck is transmission fluid? She then got out a clear milk jug of brownish yellow liquid, and poured it into my car.
She then closed the hood and I was on my way, by the time I had reached Auburn IA the transmission problem had rapidly worsened where the transmission made strange noises, and the car had to be floored to keep going 30 MPH.
Eventually this lead to repeated engine overheats, that stopped the car until it cooled which seemed to get more frequent, and the car was guzzling gas

Then the little red magic lamp light, and the battery light came on, the yellow helicopter light started flashing, and the little thermometer light stayed on. I realized I had to press on since I was in the middle of nowhere and I would deal with all those warnings later.
The engine started making all sorts of squeeking and rubbing sounds shortly after the lights came on, and a few minutes later there was a deafening bang, and the car just gave out, and smoke started pouring from every opening on the car.
I am using my iPad, and I am asking this question while I wait,
Added (1). I have called a tow truck, and it will be a while before I can be towed to storm lake. I was going to be headed from Clarinda to Bemidji, when this stupid hiccup happened. Was the liquid they poured in transmission fluid, and what the heck is transmission fluid. What the hell did the indicator lights mean. I know the gas pump light means low fuel, but what the heck is the magic lamp light or the helicopter light. The Car Is a 1998 Chevy Malibu,
Added (2). : There is a gaping hole in the lower engine and oil everywhere under the hood around melted hoses and wires. What could I do to get the car back on the road, are there any fixes we could do. I am currently on the roadside blowing a whistle, while my daughter twirls her flagline flag from band trying to keep visible to drivers and avoid being hit by a car round the bend. The blinkers wont work and the horn wont work, so this is my only method of letting other drivers know We are stranded.
Added (3). Did the car wash put in the wrong transmission fluid, could I sue THEM FOR CAUSING ME TO GET STUCK OUT HERE. How could I get the blinkers or horn working so we have to stand out on the roadside with a whistle and waving my daughter's old marching band flagline flag just so I don't get creamed by a big rig or some old fart farmer in his tractor. What am I to do, I cant even get the car shifted into neutral so it can be pushed. What exactly happened, and am I doing the right thing.
Added (4). Is there such a thing as transmission fluid, the tow people say yes, but I want to know if they aren't trying to trick me. Can you explain what happened and what to do, it could be up to two hours before the tow truck comes.

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