This is a multi-part question. 20 minutes of ice per hour is the maximum frequency to use ice. Use ice every time you exercise and any other time when pain or swelling are present. Cold therapy continues to be useful through the 2-week, post surgery period and often up to 6 weeks. Each case is unique.
Every patient requires a different amount of weight-bearing for the leg.
Your physician should have given you a weight-bearing threshold, or the amount of weight that your leg should take. This threshold will increase with time and rehabilitation. You should have received a timeline that specifies those thresholds at two, four, six and eight weeks. When you are finished with your timeline, you should slowly wean yourself from the crutches. Use both crutches as you walk then slowly progress to one crutch under the arm opposite your injury.