(B) text file with summary info.  We don't have commands for that.  For things that are Chimera attributes, for example areaSAS for residues, you would open Render by Attribute (under Tools... Depiction or Structure Analysis), show the desired attribute in the histogram, and then use that tool's File menu to save the attribute values to a file.
<http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/render/render.html>

The number of ions, ligands, chains aren't attributes as far as I know.  You would have to do something yourself such as "select ligand" and then see how many residues were selected.