How to build muscle mass and tone

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Hi guys, I’m 18 (make) and I’m about to go off to a college that has nice workout equipment. I am rather small (5’6” 128lbs) I was wondering if anyone could give me some tips on how to loose fat and gain muscle. For the next month I’ll only have access to a barbell and a treadmill, so any help would be greatly appreciated! Thanks guys!