StrongLifts.com is a free site with strength and muscle building guidance. The 5x5 program is one that I've seen recommended several times as a good way to get started with heavy lifting.
The two basic workouts are
|StrongLifts 5×5 Workout A||StrongLifts 5×5 Workout B|
|Squat 5×5||Squat 5×5|
|Bench Press 5×5||Overhead Press 5×5|
|Barbell Rows 5×5||Deadlift 1×5|