1) Enter find mode and enter a single ! in the name field and Perform the find. Sort the records by this name field so that duplicate names are grouped. What you do next depends on your data. If you have a modification date field, you can include this field in your sort order so that the most recently modified/created record is listed first within each group of duplicates. You can then delete or omit the older duplicates.
2) Check out Instant Web Publishing--this is an option that makes it possible for you to publish your database to the web though you'll need to research this option further to see if you can get it to work for you. There are layout limitations and technical details that have to be done just right if you plan on doing this yourself. Some people contract with a web hosting service to publish their FileMaker database to the web for a monthly fee.