Brakes and engine miss

I have a 2001 Ford Windstar and the brakes went out on me earlier in the week. I was able to nurse it in to a repair shop. They said the wheel cylinder ruptured. They replaced both rear wheel cylinders, brakes, and drums. I paid over $400, when I picked it up and left I tested the brakes and the van had a terrible vibration. I took it back and they claimed it was from the front and replaced the front rotors and brakes and tie rod ends. Another $400. It is still vibrating when I hit the brakes any thoughts. Also now the engine has a miss any ideas what can cause the miss. I am supposed to leave in the morning for a vacation. Any help would be appreciated I am little afraid to go now with the van.