Yes nodulling support custom Taxonomies. You can do whatever you want.
Yes You can use it.
Yes Admin can add custom fields as many as they want
nodulling is build up with latest security to almost eradicate fraud.
nodulling is fully customizable ypu can create whatever you want.
Yes, Each user will have there own page and dashboard.
Yes it is Google AdSense supported.
Yes nodulling come's with complete Messages solution. You just need to go to your dashboard to see all conversations
Yes u can select add will be approved automatically or on approval
All Registered user can post free ads, And IF user want to post featured ads then user must need to purchase a plan.
Yes from back end you can change currency options