Blown Piston

I purchased a 1996 Ford Taurus wagon from a reputable car dealership with a 90 day warranty. I started having problems immediately with the electrical, the air conditioning belts, repairs to seals etc. This was fixed on warranty so I felt the car would be ok for a while, the minute the car was off warranty, I had major oil leaks, had to replace air conditioning belts again, and $2,400 later the piston piston blew & the engine siezed. Repair quoted at $5,000.00

Is there any way the mechanic could have known that the car was about to pack it in on any of the 8 prior major repairs? Were they just doing make shift repairs until the car was off waranty? I feel quite ripped off. I paid $5,000 for the car plus $2,400 in repairs & 8 months later, I am told I will be lucky to get $200.00.

To make matters worse, I then purchased a Plymouth Voyager (1994) at an auction for $1,000. I know I was taking a chance but I really can't get to work without a car. Well 3 hours after I bought the car I heard a noise & oil was leaking everywhere. Guess what - the tow truck driver thinks I blew a piston. Is it worth having the engine rebuilt? I really don't think I'm up to buying another used car.