I too am having a simimlar problem with apt...
when I use apt, it would not find the command, so I tried to install it, using the same command
it would also not find the install command
So I tried with YAST2, I added the Mirror
and I tried to search for apt and it would not find it.
Is there something I am missing? and is there something wrong if bash is not even fining 'install'?