ok so you are trying to gain about 15 pounds.................
there are 3,500 cals in a pound.......................
if you consume 500 more calories a day, for 5 weeks while doing the same amount of lifting, you will have your answer.
if you want it to be mostly lean, then you will have to do some trial and error with calories and the amount of cardio you do during the day.
i would do 30 minutes walking with an added 500 cal threshold, then allow it to pack on at a slower pace, but thats me.
as for supps, if you are eating well...........just a normal multi a couple times a day, some b vitamins, and lots of sleep.........try magnesium in bananas before bed with some milk(potassium). potassium and magnesium have a synergy to them and they aid in sleep.
hope that helps