No, quickest and easiest way to go would be to use Player application (among others Editor use it), but still You’ll have to write some startup logic that will load scenes and ui created in the editor (see all script samples for reference). If You wan’t to do something more serious, You’ll propably have to dig into using Urho3D library.
None of these. Editor is not only a sample, as it allows You to create scenes, ui and some resources (materials, paritcles etc.) that can be loaded and used in Your application, so You don’t have to create everything in code, but there is no build in scene managment, settings system etc. so You’ll have to write them on Your own and that’s the biggest difference when compared to Unity or other popular engines.
I know that these are personal preferences, but in my opinion this difference is one of the main advanteges of Urho over other engines - it requires a bit more work, but in exchange You get much more flexability, since, in most cases, You’re not limited by some pre-designed systems.