Well there is no way to tell gender from the pictures you posted (To tell the gender you have to either pop the snake or probe the snake. You can find info about both methods on this site but be warned that you can injure a BP by improperly sexing them)
I would put that age at no more than 4 months but likely younger.
Do you have any thermometers/hygrometers in the cage? what arethe current temperatures/humidity?
Check out these 2 threads, they cover all of the basics and should answer most of your questions.
Care: http://ball-pythons.net/forums/showt...ius)-Caresheet
Cage heating: http://ball-pythons.net/forums/showt...t-Thermometers
Welcome to the site. If you ever have any questions feel free to ask!
This is how I house all of my Ball Pythons:
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