The bodybuilder standby for sets and reps is usually 3-4 sets of 8-12 reps. That's usually the right rep range for muscle growth (hypertrophy). If you're a beginner, make sure your first rep looks just like your last rep. If you fail on the 8th rep, use lighter weight. If you're unfamiliar with many of the movements, stick with lighter weight until you have a great foundation and feel comfortable challenging yourself; this will help you avoid injury.
What about cardio? Get stronger. That is what matters most when it comes to transforming your body. Extra movement is always a good thing, so you can aim for at least 30 minutes of light to moderate movement every day, or just on non-lifting days. You can do traditional cardio activities if you prefer (i.e., cardio machines), but I recommend doing something fun you actually enjoy.
However, I am not stupid and I know that most moms just do not have that extra time to make it to the gym everyday-this is why I created my very own and affordable 12 week home workout program that uses barely ANY equipment! Instead, the program uses your bodyweight and one pair of dumbbells. It is absolutely perfect for busy mommies who want to workout when baby is asleep, for when it is super cold or super hot ouside, or just want to workout in the comfort of their own home.
High-intensity interval training (HIIT) is generally defined as an activity performed with very intense periods of work followed by periods of rest, performed for multiple sets or rounds. Hill sprints would be a good example of high-intensity interval training. On a perceived effort scale of 1 to 10, 1 being sleeping or watching TV, and 10 being maximum physical effort, your perceived effort should be an 8 to 10 during work periods (depending on how experienced you are), and a 4 to 6 during rest periods.

Let’s not forget how resistance training speeds up your metabolism. With every pound of muscle you build, you will burn an additional 35-50 calories a day, even at a resting rate, and that adds up: if you gain 4.5 lbs of muscle, that’s an extra 150 calories burned a day, which is 4,500 extra calories burned each month, and THAT adds up to losing about 15 lbs a year. HELLO!
But when I started college, I had to give up gymnastics to focus on my studies. That's when I quickly learned you can’t eat the same way when you’re training eight hours per week as you can if you’re doing almost no physical activity. Long story short: I gained roughly 20 pounds and just felt horrible in my own skin. So after the stress of getting into university was behind me, I decided it was time to “get in shape" (an expression I now hate, but more on that later).
If you’re trying to starve your body by eating fewer calories than it needs, of course it’s going to fight back. I used to tell you that then, when you wanted to eat less than 1200 calories a day. The problem was, I thought 1200 was enough. I thought that was plenty to support a healthy body. Why did I believe that for so long? I’m sorry because I wasn’t trying to trick you or play games to get your money. I believed the lies we were fed as much as you did. 
There is no reason why you cannot hit your protein needs DAILY! With quality, low carb and fat protein powders like Whey Sensible from PGN, it is delicious and easy to whip up a fast shake and satisfy that sweet tooth at the same time. Dietary protein is very important in a woman’s diet. Women need the same amount of protein as men (adjusted for bodyweight). It is recommended that active women eat about 1 gram of protein per pound of bodyweight.
When you strength train, your muscles are broken down, and then rebuilt over the next 24-48 hours. While your body is rebuilding those muscles, it’s recruiting more calories and energy to make the process happen (generally referred to as the ‘afterburn’ effect).  What this means is that your metabolism operates at a faster level even while you’re sitting on the couch after a workout.