Sold a car without full disclosure, Should i talk to a lawyer first?

I was sold a used 2007 Toyota Camry for $18k(KBB Value) with 18K miles and had a 3yr or 36,000 mile warranty. i noticed that the temperature Gauge was not not showing the outside temperature but i was not in a position at the time to get to a shop immediately to check it out and i also figured it would have been covered under the warranty. 7 months and another 5K miles later i finally take it to a Toyota dealership only to find that:

1. The actual unit was missing from the car

2. The engine is leaking oil, Coolant and the Power steering fluid

3. The original Engine had been replaced with an aftermarket engine which voids the warranty!!!

4. We pulled up the VIN# There are signs that the car had been in a front end collision and that the engine indeed need to be replaced(Possibly replaced by former owner.)

I took the car back to the dealership and they put me in a loaner for now, they apparently fixed the car but i decided i wanted out of the Camry. They are letting me out of the car for a comparable one but they are saying the car has depreciated in value and the trade in value is was 12K for the car ( i still have 11,000 that I'm financing). i feel as if I'm losing out on more cash than i should be and now I'm considering asking for my down payment back and going elsewhere . BTW none of this information was not on the car fax report which i know is kind of a useless tool. Is there any reason i should get a lawyer involved in this mess?Sold a car without full disclosure, Should i talk to a lawyer first?
tell the dealership you want 18k in credit or the next call you make will be to the Atty Generals office and the DMV fraud division. you can also call ToyotaSold a car without full disclosure, Should i talk to a lawyer first?
Well, you can either write it off as one of life's less beneficial lessons or you can pursue it legally.

Personally, I would simply talk to a lawyer experienced with such issues just to get an idea of what all of my options are. Obviously, the dealer doesn't have much of a defense in this case.Sold a car without full disclosure, Should i talk to a lawyer first?
By using legal service, I look at it as spending more money than you should. It's terrible that this has happened to you, but cars do depreciate just that fast, and losing out on 6 grand is not unheard of... especially since you've had the car for over half a year and wracked up those miles. Looks to me as if you're just going to have to suck it up and cut your losses. At least they're being nice enough to let you out of the Camry... THAT is something that you should be looking at as a bonus. Even though it feels like you get the short end of the stick and you FEEL like you're getting ripped off, I don't believe you are. You could argue until your blue though... Maybe they'll up you a thousand of two.