Can vendor create attributes and attribute sets in Magento?
In marketplace basic vendor can not create attributes or attribute sets for product form or registration form. Vendor can create attributes sets or attributes only if Vendor Product Attribute and Vendor Attribute Add-on is installed.
Here is the link from where you can purchase these add-ons and also help you in understanding the add-ons in detail: Vendor Attribute Add on: http://cedcommerce.com/magento-extensions/marketplace/vendor-attribute-addon
Vendor Product Attribute Add on: http://cedcommerce.com/magento-extensions/marketplace/vendor-product-attribute-addon