To get around the copyright issues, just do your own photography and make your own graphics. :)
The headings listed above seem to be the standard, these days.
The things people want to know are, what the requirements and dates are for Sacramental Preparation, marriage, and baptism, Mass times, Confession times, how to get to the Church, and how to get hold of someone at the Office, so keep these things near the top of your file hierarchy, and easy to find. Also, keep them up to date -there's nothing more frustrating than thinking you're late for this year's First Reconciliation classes, so you check the web site to see if you've still got time to register, and the information is two years old. (Once the classes are finished, take the dates off, and put a message of congratulations to the students who completed, together with a note that the page will be updated as soon as next year's dates are approved.)
As a rule of thumb, new information should get on to the web site within 24 hours of you finding out about it. Be in constant communication with the Office, so that nothing slips past you.
Have a calendar of upcoming events - CWL meetings, Christmas parties, etc. - and also keep this up to date (just copy it out of the weekly Bulletin every Sunday afternoon, and upload it as soon as possible - or, better yet, have the secretary e-mail it to you at the same time that she's putting it into the Bulletin). Take old events off immediately after they happen; don't leave them up there for days or weeks on end.
Put a "News Feed" on the index.html, and link to everything that requires input from the congregation - for example, if SVDP needs volunteers, put a headline about it in your news feed, and link it to a page that gives all of the necessary information so that people can respond right away. That's also a good place to put up the Advent and Christmas calendar of events, as well, so that new visitors don't have to go digging for the information. :)
Cool stuff to have - if your parish has unique artwork, have an art page that people can look at, featuring your parish's artwork - people might choose to come to your parish because of the art. :)
A photo album page for recent celebrations is also a nice touch - put up between five and seven photos of the parish Oktoberfest, or Christmas party, or whatever. (Don't use full names, and don't put the names of children, for safety, but just "Kids visit Santa" or "A good time was had by all" or whatever is appropriate.) This shows that your parish is a welcoming and friendly place to come.