I'm not sure age, but looks to be a male to me. Males have spurs on their back feet, and I do believe I see spurs on that first picture
(Attached a picture of my males feet)
I'm sure someone else would be able to determine age better
Likely a juvenile to subadult and I see spurs so a male...picture judging 5-7 ??? (Somewhat educated guess)months...if you weigh him others may be able to chime in with a bit better guess...use a food kitchen scale good luck with your new friend