well... im not sure what the minimum requirement would be.... but most people do BW exercises to failure(until correct form is compromised), and then you have the cross fitters who go until complete failure(cant fucking move), i prefer to just go until failure, the rule of thumb is to do 3 sets of each exercise until failure. giving a minute or two in between sets for recovery. and only giving 2-3 mins in between each exercise.  the great thing about this is you dont need to remember how many reps you do or any of that garbage, your body will tell you when youve had enough, and after 3 sets of failure = success

list of exercises on wiki:

Quote:

    * Burpees
    * Crunch
    * Dip
    * Jumping Jack
    * Press up, or push up
          o Diamond Pushups
                + Similar to traditional pushups, only placing hands together so a diamond is formed between joined thumbs and index fingers.
          o Hindu Pushups
          o Planche Pushups
                + Similar to traditional pushups, except during the entire duration of a set, the hands alone touch the ground, arms straight, legs elevated off the ground straight and together in line with your shoulders, horizontal to the ground
          o One Arm Pushups
          o Plyometric Pushups
                + Similar to traditional pushups, only launching up as fast as possible, so that hands coming off the ground.
    * Pull up, or chin up
          o One Arm Chin up
    * Sit up
          o Russian Twist
                + Secure your feet either by placing them under something or by having a partner hold them. Begin doing situps but when you're in the "up" position, clasp your hands in front of you. Moving only at the trunk, rotate to one side. At the end of your range of motion, quickly reverse the movement and rotate to the opposite side. Repeat in a rapid fashion for the full number of reps.
    * Squat
          o Squat Thrusts
                + Stand with feet together. Squat down and place your hands on the floor next to your feet. In an explosive movement, jump feet backwards into a push-up position, jump feet back between hands and stand up. Add intensity by adding a jump after you stand up.
    * Pistol, or one-legged squat
    * Handstand Pushup
          o Face wall then do a handstand, facing away from wall, feet resting against the wall. Bend your arms so your body drops halfway, then straighten back up. Repeat for 10 sets.
                + Alternately, drop your body down halfway then hold for 30 seconds in stress position.
    * Lying Hip Swing
          o Lie on your back with the legs pointed up, arms on the ground extended to each side, Maintain straight legs and swing your legs all the way to the left and then all the way to the right. Stop just short of touching the ground with the feet.
    * Leg Lifts
          o Lie on your back with your hands under your buttocks. Lift your feet about six inches off the ground, legs held together. Spread your legs as wide as possible, while keeping legs off the ground. Move legs back together. Return to rest position. Repeat for 20 reps.
                + As an alternate, keep feet off ground in stress position for 30 or 60 seconds.
    * Mountain Climbers
          o Assume pushup position, with hands on floor with shoulders over hands. Tuck one leg under torso with other leg fully extended. Keeping weight on balls of feet, as quickly as possible, "climb" alternating legs back and forth in a jogging-type motion.
    * Grasshoppers
    * Side Bends
    * Box Jumps
    * Roman Chair
          o Stand against wall. Slide halfway down wall, as though you were sitting down, if there were a chair. Thighs should be parallel with ground with knees bent 90-degrees. Hold your                  arms out, straight, so they're also parallel with floor. Hold position for 60 seconds.
    * Pike Press
    * Reverse Bridge
          o Lie on floor, face up, arms extended over head. Make a bridge so your back is arched and your body supported by arms and legs. Maintain in stress position for 60 seconds.
                + An alternate is to assume same position, then gently balance on head so that body weight is supported by head and legs. Maintain in stress position for 30 seconds.
    * Front Levers
    * Back Levers
    * Planche
    * Reverse Planche
    * Iron Cross variations (including inverted, Maltese, and Victorian)
    * Rainbows: move the body from a reverse planche through a hand stand to a planche or the reverse.

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