I don't really care what gender my Tama is. It's my little digital pet and I'm going to care for it regardless if it's male or female.
The Pencil, Sun/Sparkle, and Flower in the Health Icon are your Tama's Skill Points. pecnil is Intellectual Points, the sparkle is Art Points, and the flower is Social Points. The number of Skill Points you have determine what character your Tama will be, as well as what job it will get when it's older.