The difference between them is that freehold ownership gives you full ownership of the property without restriction, while leasehold allows you to own the property for a set period of time, which is up to 99 years.
Yes, you can. In Dubai, there are different communities where you can get a property directly from the developer or individuals who are selling their units.
In Dubai, a title deed is an official and legally binding document issued by the Dubai Land Department (DLD) that certifies the ownership of a property.