Just bought an old car, costing me a lot of money, what are my rights?

I bought a 2004 Honda civic from my mechanic 4 months ago (190,000 miles) he had gone through and fixed everything and was going to charge me accordingly.
When all was said and done, it was about $4,300.
A couple weeks later, my check engine came on, no heat and the car was stalling… Brought it in and he fixed it for a couple hundred
A month after that the engine starts to rattle like mad and the car won t move… Brought it in, he said the transmission is bad, fixed it for $1,200
2 months later (currently) no heat, smoke pouring out from under my hood, I pull over and anti freeze has exploded all over everything…
This time I take it to my boyfriends mechanic, he says all 4 of my ignition coils are bad and my car is burning anti freeze. He s replacing the coils for me… Now what can/should I do about this? Do I have any rights to go after my mechanic?
Thanks!

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