2006 Ford Freestar drivetrain & axles problems

I was driving on a highway in my ford freestar 2006 and the minivan seized, I lost control of the vehicle. The brakes were not working properly and I had drifted off onto the side of the highway were the grass and a few turns helped slow down my vehicle. I had to immediately jump out of the vehicle because there was smoke coming from the engine, but the vehicle would not stop. When the vehicle finally stopped, I jumped out and an ambulance assisted putting out the fire.

Where to start.... Every time its raining my van starts to putt and stall out I have almost had 3 accidents due to my van stalling on a main road trying to get home...issue #2. I use my key pad to unlock my vehicle on nights that im working and lately it will unlock then re lock n unlock over and over with out being touched. I was driving down a road and it would unlock and lock.. Its not safe if its unlocking its self and my 2 year old reachs he could open the door while driving... Issue #3..