How many people, both combatants and non-combatants, did the Prophet Mohammed kill?

Personally ??

Yes, personally. Thank you.

According to some, it seems his name continues to be used for the sake
of indescriminate killing

As far as I know, the number is only 1, which has occured in a war.
Other than war, there is no personal killing. He is sent to bring
compassion to the world, and he did. No crazy terrorist, whatever they
claim, can change this.

This question has become of prominent debate among many people. The
amount of people the prophet directly killed is probably more than
one, but it is unknown. However, the amount of people he has directed
to kill has become more of a debate. For most questions on Islam, you
should go to http://www.drzakirnaik.com/pages/qanda/index.php . This
website is a fansite of one of the most authoritative Muslim scholars
on the planet. The truth of Islam (as what it seems like your looking
for with that name) can more understood here. I am currently in the
process of making a website on Islam with links which go both for and
against Islam. When it is done I will post it on this question. Also,
when looking into Islam and terrorism/violence, the reader should
understand that while Islam says to go to war in times of persecution,
the Bible (specifically the story of Moses), also has scenes of
violence. For a more neutral study of Islam/Christianity, go to
http://www.skepticsannotatedbible.com/ . It is not perfect because a
lot of their arguments are based on false translations and evidence of
both the Quran and Bible. However, it is one of the best compared to
the biased websites.