Hi Thinkerbell: The recommended minimum for getting started is two to three days a week. Do not lift the same body part two days in a row. Your muscles require 48 hours to heal before you may lift with heavy resistance again. You may however continue to do the cardio everyday. Make sure you are crosstraining your cardio whenever possible.
It is wise to introduce lifting slowly into your program. It will give your ligaments and tendons time to adjust to the new stress they are experiencing. Muscles recover and develop a little faster than these connective tissues. Just a little FYI.
Your routine should be a full body that hits the major muscles of the upper and lower body. Select exercises that will hit the chest(pectoral) shoulders (anterior, medial, posterior deltoids) biceps and triceps, back (trapezius, latissimus dorsi) abdominals, glutes, hamstrings, quadriceps, and calves.
One exercise per body part will get you started. Select a weight heavy enough to fatigue your muscles by the 8th or 10th rep. To really be effective you will want it to feel like you almost can't make that last second rep. After about four weeks you may then add a second set to your routine of 8 to 12 reps.
Form is also very important. Research and watch videos online that demonstrate proper form for the movement. Do not sacrifice form for just one more rep.
Make sure you are using full range of motion in your lift and use a nice controlled speed lifting as well as lowering. Don't lift the weight so fast that you are using momentum as well as your muscle. Also, when lowering the weight do it
nice an' slow. I can't tell you the number of times I've seen people waving weights around that were obviously too light and so fast it could be considered an aerobic workout.
The books and websites previously mentioned are full of suggestions for addressing these muscles. Many of these exercises are compound exercises which means they will hit more than one body part at a time. This is a great thing to incorporate into your program so that you can workout a little more efficiently while in the gym or at home.
Good luck and happy researching/lifting.