Deca definitely will increase your appetite. That's one of the ways it works, but you have to be eating a solid diet as well. You can't just take it and expect miracles.
Thank you so much for posting this question. When it comes to TRT, everybody's different. I've seen people run anywhere from 100 to 300 mg a week. It just depends, but if you go high, make sure you keep an eye on your blood work.
I always like Tren with Anavar. I think they stack really well together because Anavar is a very mild option. 250 mg of Tren and 50 mg a day is Anavar's perfect.