How to import 3d model from blender to unity (Added things in node editor and material)

First, what you are doing in the node editor in Blender is basically ignored by Unity. In the node editor you are creating a complex shader for the material you are working on by combining Cycles' built-in shaders. Unity has its own set of shaders designed for rendering in a game that you will need to use in the end.

That said, you can still get something close to what you have in Blender (I will assume you are using Cycles not BI). The solution to the problem is what is called baking. If you let me know what kind of material this is (metallic, wooden, etc.) I can help you further, but here goes a generalized baking tutorial.

1. Make sure you have a good UV map on your model

2. Add a texture node on your material with the image you want to bake to (this should be a 2048x2048 image in most cases)

3. Go to the baking panel in Blender and select Diffuse Color

4. Hit bake then save your image

5. Export your model as an FBX (make sure you have only the baked UV on the model at this point)

6. Import your model into Unity

7. Import your texture into Unity

8. Assign your texture to the material

Let me know if this helps ;)