how will tone or writing style ,change based on the different type of people you will be communicating with

Answer 1

http://www.google.com/search?hl=en&as_q=writing+for+audience&as_epq=&as_oq=&as_eq=&num=10&lr=&as_filetype=&ft=i&as_sitesearch=&as_qdr=all&as_rights=&as_occt=any&cr=&as_nlo=&as_nhi=&safe=images

That's called being conscious of your audience. Read several of these articles, and then let us know what you decide.

Answer 2

Here are some helpful hints:

http://www.members.cox.net/dagershaw/lol/MessageAcross.html

I hope this helps a little more. Thanks for asking.