Jalapeno and Tomato Seeds - How do I Start Growing Them?

[rainbowgardener]

YAY!!!! It's amazing how exciting this stuff is. You can stick a seed in and then in a few days up pops this beautiful little sprout. The lettuce and spinach seeds I planted outside last weekend for fall "crop" (one raised bed I'm talking about here) have all sprouted. I'm excited too even after years of doing this.

[Trouble]

I'm a little worried. I left my plants in the shade for an entire day and when I went to place them back where they should be, they had a little white fuzz on the soil. Is this bad?

[Trouble]

One of my tomato seedlings died The leaves turned brown/olive colored and then shriveled up and died. Is this disease?