First stop is the search page on LQ - your questions have many previous answers.
Since you are clearly new - here are some fedora resources with some answers you want.
Check with those, and get back to us if you still don't know what to do.
For wireless issues, we need to know which wireless card. Unfortunately, the brand name is usually unhelpful. The trick is to open a terminal and enter
this will give you a big list, find the bit that says "wireless" and post the whole line to your reply.
For multimedia - fedora 11 plays audio and video files which come in non-restricted formats.
Restricted formats are available in the livna repos - but you should be careful to make sure that their use on your linux computer is legal in your country.
for root login - you have to change the root password.
But you usually don't need it - just use sudo instead. For a root terminal, use sudo su -