How much water and sun should I give my baby tomato plant a day?

I just got it almost a week ago, and apparently I'm not doing something right... Its already starting to wither and almost dying. I water it alittle every other day to keep the soil moist and give it aittle over an hour of direct sunlight everyday. What am I doing wrong? I am very inexperienced at this but really love plants - this is my first one.

How much water and sun should I give my baby tomato plant a day?
I specialize in tomatoes. they will use 24 hours of artificial light a day.DO NOT WATER EVERYDAY.unless your soil really dries out. always start at the soil. how porous is the soil?Is it a heavy soil? Are you using city tap water or a fertilizer.First go buy a soilless mix(it sounds as though you have a fungus called dampening off)this mix is sterile and won't cause dampening off. then go get yourself a fert with a NPK of 0-4-0 or something similar .This is a root stimulating fert call phosphorous. get a fan and put it on your plants for at least 15 mins a day.also get some floresent lighting and put the light three inches from your plants 24 /7and only water when the soil is dry this makes your plants search for water. if there is lots of moisture your plant won't search and the roots won't grow.Lots of moisture can also be a breeding ground for fungus .
Reply:As much sun and water as possible. And keep it warm.
Reply:they dont really need much. keep the soil with water, fairly moist, and water frequently should be fine! dont forget they need a lot of sun!!!
Reply:They love lots of sun and you need to water really good at least once a day. You have it inside still? are you in a cold zone?-and have it on a sill? They have deep roots and need to be planted out side in a very sunny spot and water them good each day.