Firstly, don't worry about getting too hugely muscled - lots of people when they start a training program say this sort of thing, like "I only want to tone up, not get big". Getting big takes alot of work, alot of lifting big weights, and alot of calories (inc protein). It doesn't happen by accident so don't worry about that.
You want to pick an exercise for each part of your body, so say:
Bench press (for chest),
Shoulder press,
Dumbbell row (for back),
Squats (for legs),
Bicep curl,
Tricep extension.
(You should be able to find explanations of these exercises online). And do some situps or crunch's for your abs (say four sets of 25 at the end of your workout).
Do all of your sets for each exercise before moving onto the next one, and do all the exercises in each workout (you could move onto more exercises and split workouts later, but start with all exercises on every workout to get your core strength up). Start with the first exercise, do a warm-up set to get the muscles going (light weight for say 20 reps). Then do 4 sets of 15 reps, gradually increasing the weight until you can't do 15 on the last set. After a few workouts you'll find that you can do 15 on the last set so you then increase all the weights a bit. Leave a minute or two between sets to allow your muscles to recover, ready for the next set. Once you've completed all the sets for one exercise, more to the next. And always do the exercises for larger muscle groups first (ie, squats, bench press, etc, then arm exercises afterwards).
Less reps and higher weight is more likely to make your muscles grow bigger (I usually do sets of eight), and there has been evidence that doing four sets is not necessary, so if time is an issue then do less sets but always make sure that the last set is a struggle! You should see some changes pretty quickly (within a few weeks I would hope). And make sure that you don't 'cheat' any exercises (ie, swinging a weight or you body to help get the weight up) - lots of people do and it doesn't work; you're better going to a lower weight and doing the exercise properly.
Hope this helps, I should know what I'm talking about (in theory lol), as I have a degree in it!
Rich