Lyx installation in Mint16

[James A.R. Koehler]

I have installed Lyx (several times!) on two Mint16 machines; one a 
32-bit version and the other 64-bit.  Mint is based on Ubuntu 13. In 
both cases, when installing either from a download from the Lyx site or 
via the .deb repository, it installs without any classes or layouts; 
i.e., it is not very useful.  If I try to read the User Manual, it comes 
up with an error saying it cannot find the appropriate class to display 
the data.  Catch 22.

In previous installations on earlier distributions of Linux in other 
years, the installation was seamless and problem free.  Help!

Jim