engine not starting, smoke in air vents

I replaced the spark plugs in my car after it had died and when i tried to start it and there was a noise then smoke. What could cause smoke in the air vents?

I have a 1991 Toyota camry that I have owned for almost a year now and earlier this week it broke down on me. I was driving and with out any warning it shut off on me. I thought it was a fuel pump issue and when I replaced that it didnt fix the problem. The starter and battery are fine and the engine turns over but wont catch. I have read a few different things online to try and find the solution and decided I would try the spark plugs. I replaced them with new ones tonight and found one was burnt out.

Once I finished I decided to try and start it. When i turned the key it turned over and as i was letting go i thought it was just about to start then i heard a noise under the hood i tried to start it again but the battery died the first time i tried after the spark plug. when i looked ahead of me i saw some smoke was trailing out of my hood. Popped the hood and found that there was a large build up of smoke in the air filter box. What could be causing that smoke?