vain_nayias saidTo failure means until you can't do anymore
And 1 or 2 sets of repetitions of 12. Basically a set is the amount of repetitions of an exercise you do (how many times you lift for a given exercise).
Since you're new you could always check out websites for exercises like this one:
From there you just workout each muscle group like brendanmuscles said. Try not to overdo it though and do twenty exercises for chest and another twenty for back. Keep it simple 3 to 6 exercises for each, 3 is underdoing it at times though and 6 is overdoing it at times too.
A good site for this type of stuff is bodybuilding.com since this site focuses more on all sports.
i disagree with something here, 3 exercises is definitely NOT underdoing it per bodypart. In fact, normally i stick to 3 exercises for bodypart, (sometimes 4) with either 1-2 very hard working sets, or 1 straight working set followed by a big drop set, or just a big set of 3-4 drop sets
for example, quads: ill do smith squats, leg extensions, and hack squats/ leg presses. Sometimes walking lunges
biceps: ill do preacher dumbell curls, standing dumbell curls and some type of cable curl ( i never exceed 3 for biceps)
shoulders: ill do dumbell shoulder presses, lateral cable or dumbell raises, and reverse cable flyes or reverse pec dec machine. Ill also do 2 for traps, but thats diferent than for shoulder exercises.
really 3 exercises is preferable because if you pick the correct 3 exercises, you can hit the muscle from every angle. theres no need to be doing more if ur really pushing it with those 3. Yes i do four sometimes but i know ide be ffine with just 3 exercises.