Rodrigues

I replaced all my plugs today because they were fouled from tons of gas, before I couldnt even start it, so now I started it and I have to keep my foot on the gas in order for it to run. While I am doing this smoke is coming out of the hood, the side of the car and out the back. It seems like my whole exhaust is smoking, after i let of the gas it died and I went to go check what was smoking and one of my primary headers was coated with a white colored stuff that appeared to look like frost. It wasn't this bad a while ago, now I think I am just screwed.