[Untamed]

Bro, the secret to getting big is the big three! Concentrate on lifting huge numbers on deadlift, bench, and the king...SQUATS. Yes, squats will lead to a bigger chest.

At your age and weight you need to EAT EAT and then eat some more. I cant really answer your question because no machine is going to get you a big chest and traps. You need to lift big weight on compound movements. @ 155lbs your main focus should be on lifting heavy 2-3x's per week and eating 250g/protein per day as part of ~3300 cals.

fitday.com will be your best friend

It's as simple as that: LIFT BIG EAT BIG and also read and research. The internet has so many websites and forums.

-UT