Ford is not McLaren. When it says 1000, it means 1000 ( not 1000, plus another 1000 spiders, oh, and another 500 special carbon editions!).
But Ford did not say 1,000. They never said any number. They simply said they could currently make 250 per year, announced the first two years, then announced another two years. There's nothing stopping them from increasing production or extending the number of years. Now given that they made over 4,000 of the previous car, and they're currently selling for around double the original MSRP, I'm not saying that's a problem.
As far as the two-year right of first refusal/no sale agreement, I had to sign one when I ordered my 12c. I showed it to my lawyer who laughed and told me"in America, no-one can stop you from selling your possessions" so, at least in the US, it's worthless. If an individual did sell within two years (as is guaranteed to happen at some point) they'll never get a shot at any future special Fords. I've already heard of two brokers offering $1.2 million for a car. They won't be getting mine!
I think your lawyer is giving you bad advice. I work with contracts a LOT and been involved with contract litigation and I would certainly never hire a lawyer who told me I could disregard any contract I had signed. I've seen that backfire, luckily not for me, in a huge way before.
They can stop you from selling your possessions if you sign an agreement that makes you not the sole owner of something you possess until some particular condition has been met. For example: you're almost never the owner of software you license, especially if it is sold with source code. I talked with a lawyer about this particular issue and he said there might be some states where that's not enforceable but in lieu of a specific state law he didn't see any reason why it couldn't be and if you agree the agreement will be governed under the law of state that allows it then they could haul you into court in that state. This isn't some dealer telling you their shady terms and conditions but rather the Ford Motor Company themselves. They certainly have the resources to go after people who don't comply with their agreements. Now whether they'd do anything about it is another story. But, depending on how they word the agreement, they could conceivably void the warranty for the car and/or refuse to allow their specialized Ford GT service centers to work on it and certainly refuse to sell you another one. They might even be able to claim damages or force you to return the car to them. They could certainly go after the person who bought it if they felt it had been transferred unlawfully because it was encumbered under a contract.