You will get different opinions around here. Some people like compound movements only (exercises that use several muscles), while others (like me) don't have a problem with exercises that isolate a single muscle. Some people don't like machines, but personally I believe they are a lot safer than free weights, therefore if you are exercising without a spotter they may be a better choice than free weights. To each his own I guess.
Some people advocate a full body workout 3 times a week, other advocate a split routine (upper body one day, lower body the next).
To answer your question, this is what I would do:
I personally prefer the split routine. On upper body I would do bench press (use either dumbells or a machine if you don't have a spotter, that way you eliminate the risk of being hopelessly trapped under a barbell), tricep kickbacks, lat pull downs and bicep curls. I would do three sets of 10 repetitions each.
On mid/lower body day I would do leg presses, leg extensions, leg curls and calf raises. Also some crunches for the abs.
Use enough weight so that you can complete ten repetitions of each exercise, the last repetition should be very challenging.
After some time, your body will get used to any workout, therefore it is always a good idea to change your routine periodically, after 6-8 weeks is what I have read.
Please note that I am no personal trainer or any other kind of health or fitness professional, feel free to take my advice with a grain of salt.
Eraser