When designing an exercise program what exercises listed below would you include to best improve muscular strength?

Stick with the basics pushups, situps, squats etc. but if you want to spend money on workout equipment buy a kettle ball set, and rowing machine very good for your legs and they burn lots of calories. you want to try to focus on more of a crossfit training which means it works all of your muscles and makes you an overall stronger person, and if your more advanced try p90x.