New to the gym, what are some exercises I should focus on?

Hello fellow My Fitness Pals! I joined my local gym this weekend to try to add some "oomph" to my weight loss. I have been steadily losing weight since November 2011 and have lost 65 pounds so far doing Zumba 2-3 times a week and eating at my BMR plus all exercise calories, making sure to fill most of the calories with healthy, raw foods. At the gym last night I jogged for 15 minutes on the treadmill at 5 mph, then did the circuit downstairs (leg/hip abductor machine, leg press, lat bar (I think it was called), row thing, etc.) 3x's around, 8 reps per station. I went out into the large weight lifting area and did 8 reps 3x's on the bench press machine (65 pounds) and arm curls. Sorry if this sounds confusing, like I said, I'm new and I'm trying to get the hang of it all. Am I randomly just jumping from machine to machine or does this sound like a routine that is going to help me build muscle? My heart rate monitor said I burned 832 for an hour and a half. I am currently 201.6 pounds and attaining a goal weight isn't as important to me as being healthy and looking toned at the end of this weight loss journey although I do have a goal weight set at 142 pounds which puts me into a healthy BMI for my height 5'4". Thanks in advance for any advice!