I'd recommend getting a gym membership. More access to more free weights. Free weights are the way to go to put on muscle. Do mostly compound movement exercises - deadlifts, bench, standing military press, squats, bent over rowing, etc. This will help you build some size and strengh.
Depending upon what you exactly mean by 'look muscular', depends on how you eat/train. Start by eating 5/6 meals of clean food of fairly equal size - no fast food, donuts, etc. Eat more cals than you burn, so you can add some size and work on building a bit of muscle and then lean down by cutting cals from each meal, a bit at a time. Unless you just want to be skinny with some muscle showing, this is what I'd do.