outside or inside in the dark?

I've planted my germinated seeds and I set them outside. I've already had them outside all day yesterday and all night. I was wandering should i bring them inside till they sprout? I thought they need sun light but I read somewhere that that can actually damage them till they sprout. Also. I have three in soil I found in a pot. Then I went to a gardening store yesterday and bought some potting soil. I have three in this kind of soil, but it worries me that they won't grow. The soil I got is thick like mud. Was I supposed to mix something with this. One more question; How long till my plants will sprout? Whats the average time? I also put tomato food on the ones in the good soil.

IT will take up to 2 weeks to see sprouts above the soil surface.
Mud is bad. You need proper seedling mix, and lots of perlite if the soil is not crumbly enough.
If you can provide constant slight moisture, it doesn't matter about the light until they pop up, but then they need lots of it.
Don't use used soil for seeds, and only put 1 in each pot.
Read up... link's in my siggy...

Hmm. Well, can I take the seeds that I put in the potting soil out and into a different soil? I just put them in the soil last night at about 9 P.M. and its now 11:40 A.M.