Hi,
Thanks for the interest in Community Events.
Community Events only requires the Free Version you do not have to purchase anything else.
is there an option to send a newly entered event to all members (users) from the website?
We do not have that feature. We have a feature to notify certain people when an event is created though.
If you would like to request that feature please head to our UserVoice Page and add your own or upvote that feature as they will increase the chances of it being added to a future version.
http://tribe.uservoice.com/forums/195723-feature-ideas
Also, I recommend viewing our New User Primer for Community Events to see all of its features.
New User Primer: Community Events
Thanks