03 Mustang wont start need some diagnostic tips to figure out why?

I initially thought it was the cylinder lock since it feels like it is almost freely spinning inside the steering column but after replacing
it that is not the issue, but rather a symptom of something else.  I have tried starting it in many gears (it is a manual).  I have
tried jump starting it.  I get no sound from the starter when turning the key so my thought is that may be the issue.  I also do not
know much about clutches but could it somehow come into play with this problem?  It was a sudden stop working, so no symptoms
that lead to it no longer working.  Parked it and when to leave later and then it would not start.  Any help or diagnostic test would
be greatly appreciated.  I am also happy to answer any questions that might help this be fixed.