For the hair loss use some 2% nizoral shampoo, everyday. It did wonders for me, lots of regrowth.
You might also consider saw palmetto extract supplements.
If you are genuine on Test for TRT then the question of cycling is not an option for you need to be on it. You can however blast and cruise. When you blast you basically do a bodybuilding cycle of anabolics, when you finish you go back onto a TRT dose for as many weeks as you were on the blast.
As for weight gain it really depends on how you train. You didn't mention anything about that so I don't even know if you do much. Without the training you aren't going to grow muscles just by taking anabolics.