If I were creating a website for a church here are the pages that I believe are absolutely necessary.
- Home page (welcome your online visitors and tell them a little about the church)
- Ministries (ie - children/men/women's ministries; youth group, etc. . .)
- Service Times (Sunday morning, Sunday School, Mid-week Service, etc)
- Upcoming events (special services, special meetings, conferences, etc)
- Contact page (include a map with a full listing for your church)
Of course, you can include much more - but this will cover the bases.