Your gatorade mixed with some protein powder would be okay to start with for post workout nutrition, definately not the best...but better than nothing.
If you want big guns, then bb rowing and chins should be a staple before any bicep isolation work is done. I would also urge you to stay away from the machines as much as possible, they take the synergists and stabilizing muscles out of the equation and could cause imbalances using them long term. Not to mention some machines cause an enormous amount of stress, like the leg extension machine which is like the damn devil's thrown.
Start out light and keep 1-2 reps in the hole (read: no failure).
It would be best if there was a coach of some sort that could go through form with you because you can seriously injure yourself with a shoulder impingement or damaging your L1-L3 vertebrae.
So, here is how you program might look:
Day 1-bench, bent over barbell row, squat, double crunches
Day 3-dips, chins, deadlifts, hanging pike
Day 5-push press, hack squat, close grip bench, bb curls
Or...
Day 1-military press, standing hammer curl, low incline bench press, deadlift
Day 3-squat, double crunches, back extension, dips
Day 5-chins (or lat pulldown), close grip bench, seated row to neck
This is assuming you have a power rack (and a cable machine for rowing) in there, if not, this can be tweaked. Like I said, this is just to begin with. You'll want to do a set range of 3-5 and a rep range of 8-15 for AA (anatomical adaption). This is the first stage of a trainee (for those that are deconditioned), the next phase would by hypertrophy, then absolute strength, and finally speed-strength/strength-endurance.