What's wrong with my car? - 2

So I bought a 2001 4door honda civic, 5speed with a vtec engine & cold air intake. There's over 330 kms on the body but the original engine was replaced with this one at some point. ( no clue when or why)

I drove the car for a few days, and I noticed that when I placed the key in the ignition and turned it that it heisted to start (few times) but over all worked good.

The other day I was going into 3rd gear on a straight road (not fast) when it made a grinding sound. The front end lowered down and let out a bunch of smoke from the back as if I went into a lower gear when traveling at a fast speed. ( witch has happened to be before)

I pulled the car over ( but didn't turn the car off right a way) it could kinda go into gear but wouldn't let me move the car at all. I turned the car off and it would start up no problem but can't get it to move.

So I and a few people pushed the car off to the side of the road (where no traffic was) and it stayed there for 3 days. Come the time I needed to tow it, the car would no longer start up at all. The lights on the dash would come on but there was no spark or ignition to the engine nor the sound from the starter. ( the key was not left in it or the lights left on)

Come the following day when I had a chance to look at the car ( I'm no mancanic ) that I tried to start the car the lights came on once the second time no lights come on.

Now I'm left with no car, What could this be?

Maybe your tranny is gone. Maybe a broken drive axle. Maybe a broken wheel axle. Flywheel. Torque converter. And it sounds like an electrical wiring issue. Maybe a loose plug if your lucky.