Turtles need specific set ups to be healthy! A 10gal. tank is not sufficient for a turtle of any kind. Aquatic turtles require heated water, water filtration, specific diets according to the species, a heat lamp, a basking area so they can get completely out of the water and dry completely off or they will get shell rot, and a UVB light.....that is just for starters.
Also, turtles are not the kind of pet to handle and "play" with. Even small amounts of handling can put unwanted stress on a turtle.
Without proper care turtles can get sick fast. They are a huge responsibility that requires a long long long commitment! 40 years was what someone posted.......many species live much longer than that even!
A great site to check out is........ AustinsTurtlePage.com there you will find everything you could ever possibly want to know about any turtle!
Good luck