Phenotype Column: You can use quantitative value (http://pngu.mgh.harvard.edu/~purcell/plink/data.shtml#ped). Just make sure you use a period and not a comma.
Family ID: I think it depends of your experimental design and the goal of your study. If you don't care, I suggest you use a unique Family ID for each paternal and maternal combination.
can you explain the meaning of the columns?