There is currently no way to do this in Skyline.
We have talked about adding this as a feature because it would then make it easy to compare quantification by spectral counting to chromatogram peak areas.
For now, I think you would have to use some other tool to look at your peptide search results and tell you what the spectral counts were for each peptide.
I will look into whether it would be easy for us to add this feature to Skyline.
-- Nick