Free weights are all you need to put on some mass, and 155 is not bad if you don't weight too much (which I doubt you do )
I got up to 210 (1 rep) in highschool but nowadays I struggle with 150ish.
270, you weak little Texan. Rowing machine in my room is my main source of exercise. Used to cycle a fair bit, which was great on the legs.
GT5 is utterly fantastic, it's got quite a few niggles. But for driving cars, there is no better game out there.
Au natural. My diet is quite high protein anyway, well, higher than is average.