Well you have to have a UV Light, a Turtle Dock, a Filter, a Heater, and at the least a 10 gallon tank. You need 1 gallon per inch of turtle. I have two baby painted turtles and they eat "Baby Shrimp...
Baby painted turtles are mainly carnivorous at such young ages, so a commercial food product such as Wardleys or ReptoMin is normally suggested. Remember that turtles can develop problems if fed too...