How or where to access EPSG data

I'm new to ESRI, so I might be asking trivial questions. Still I could not find even a partial answer in the Help.

I have a new client who wants EPSG data in the attribute table. Specifically he wants the following fields filled in:
NAD83 GCS Lat
NAD83 GCS Long
NAD83 GCS EPSG Name
NAD83 GCS EPSG Code
NAD83 PRJ Easting
NAD83 PRJ Northing
NAD83 PRJ EPSG Name
NAD83 PRJ EPSG Code
NAD27 GCS Lat
NAD27 GCS Long
NAD27 GCS EPSG Name
NAD27 GCS EPSG Code
NAD27 PRJ Easting
NAD27 PRJ Northing
NAD27 PRJ EPSG Name
NAD27 PRJ EPSG Code
Elevation
Vertical Datum EPSG Name
Vertical Datum EPSG Code

These are required for a project containing one layer which contains only one (very important) point. How do I find these values in ArcGIS? Is there an easy way to get all these at one time, or do I need to create different projects in NAD83 Geo, NAD83 Projected, NAD27 Geo and NAD27 Projected? Where do you find these intrinsic values to put them into the attribute table? Or are they already part of the attribute table but just hidden?

Also I've never seen the vertical datum EPSG. Is this built into ArcGIS? I have elevation above sea level data from a Trimble, ut where do I find or define the EPSG in ArcGIS?