Removing message on Add listing page

How can I remove the following message on the add listing page? (visitors can only generate free listings on my website)

“Add Listing
Once you have completed the options below your new listing will be created but will not go live until payment has been received. This gives you time to check, modify and preview the listing before payment.

Also now someone can claim an admin generated listing, but is it possible to enable EVERY listing generated by does not matter who, to be edited by every visitor but make it so that the changes on the listing won’t be published until an admin approves? (what I mean is a Wikipedia style of database, everyone can add, edit and remove content and an admin approves or disapproves).