Answer by mv288 for How to automatically fetch missing dependencies when installing software from .deb?

That particular library(libctemplate0) I downloaded it from

http://packages.ubuntu.com/lucid/amd64/libctemplate0/download

The direct link http://ubuntu.wikimedia.org/ubuntu//pool/universe/c/ctemplate/libctemplate0_0.96-0ubuntu1_amd64.deb

The mySQL-workbench installation went smoothly after that.