Another thing to do called creating a component:
1. Select everything
2. Put it in the red car folder
3. Open a new scene
4. Click the red folder and find your thing (It will probably show it in a picture)
This method should be used for parts that will be used a lot, and to helf clarify, you can name it by highlighting over it, clicking a pencil icon, and typing in the name
Use the copy and paste method for something that you are going to use once