Chartjs-Setting Chart.js Pie-Graph Options

The version you are using is v2.0. The documentation for v2.0 is at http://nnnick.github.io/Chart.js/docs-v2/

1. I don’t think the pie chart has a scale, but anyway you can set it on the scale for say, a line chart (you’re probably looking for ticks.fontSize)

2. Pie border color needs to be set on the pie property of options

      ...
      options: 
      {
          elements: {
              arc: {
                  borderColor: 'red'
              }
          }
      }
   };
   

   See https://jsfiddle.net/euq7fvg1/

3. responsive is true by default