Hi Mustafa, you can send an email using the
contact form to get more information about the pricing/upgrading.
About the fields required to submit an ad.You have the option to create different forms depending on the category of the ad, containing different fields.So for example you can create a form for the "Cars" category and then create the fields "model","color","year" only for that category.If you have another category named "House" you can create the fields "number of bedrooms","construction year" etc..