Scripts named 'xxx.cs' exist in multiple locations

My game is half done and I don’t want to restart. Can someone help me understand what it means and how to fix it?

Moved log file to pastebin: unity editor log - Pastebin.com

I have NO idea how to fix this.

First off, relax. Start with one error, solve it, move on to next and repeat.

The error says that you are having scripts with the same type declared in many places. You should probably rename or delete those files/types so that there is only one of each.

Scripts named 'MouseLook.cs' exist in multiple locations (Assets/Standard Assets/Character Controllers/Sources/Scripts/MouseLook.cs). Please rename one of the scripts to a unique name.
Scripts named 'MouseLook.cs' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/Camera Scripts/MouseLook.cs). Please rename one of the scripts to a unique name.
Scripts named 'ActivateTrigger.cs' exist in multiple locations (Assets/Standard Assets/Scripts/ActivateTrigger.cs). Please rename one of the scripts to a unique name.
Scripts named 'ActivateTrigger.cs' exist in multiple locations (Assets/Standard Assets/Scripts/General Scripts/ActivateTrigger.cs). Please rename one of the scripts to a unique name.
Scripts named 'CombineChildren.cs' exist in multiple locations (Assets/Standard Assets/Scripts/CombineChildren.cs). Please rename one of the scripts to a unique name.
Scripts named 'CombineChildren.cs' exist in multiple locations (Assets/Standard Assets/Scripts/Utility Scripts/CombineChildren.cs). Please rename one of the scripts to a unique name.
Scripts named 'MeshCombineUtility.cs' exist in multiple locations (Assets/Standard Assets/Scripts/MeshCombineUtility.cs). Please rename one of the scripts to a unique name.
Scripts named 'MeshCombineUtility.cs' exist in multiple locations (Assets/Standard Assets/Scripts/Utility Scripts/MeshCombineUtility.cs). Please rename one of the scripts to a unique name.
Scripts named 'WaterSimple.cs' exist in multiple locations (Assets/Standard Assets/Water (Basic)/Sources/Scripts/WaterSimple.cs). Please rename one of the scripts to a unique name.
Scripts named 'WaterSimple.cs' exist in multiple locations (Assets/Standard Assets/Water/Sources/WaterSimple.cs). Please rename one of the scripts to a unique name.
Scripts named 'MouseOrbit.js' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/Camera Scripts/MouseOrbit.js). Please rename one of the scripts to a unique name.
Scripts named 'MouseOrbit.js' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/MouseOrbit.js). Please rename one of the scripts to a unique name.
Scripts named 'SmoothFollow.js' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/Camera Scripts/SmoothFollow.js). Please rename one of the scripts to a unique name.
Scripts named 'SmoothFollow.js' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/SmoothFollow.js). Please rename one of the scripts to a unique name.
Scripts named 'SmoothLookAt.js' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/Camera Scripts/SmoothLookAt.js). Please rename one of the scripts to a unique name.
Scripts named 'SmoothLookAt.js' exist in multiple locations (Assets/Standard Assets/Scripts/Camera Scripts/SmoothLookAt.js). Please rename one of the scripts to a unique name.
Scripts named 'DragRigidbody.js' exist in multiple locations (Assets/Standard Assets/Scripts/DragRigidbody.js). Please rename one of the scripts to a unique name.
Scripts named 'DragRigidbody.js' exist in multiple locations (Assets/Standard Assets/Scripts/General Scripts/DragRigidbody.js). Please rename one of the scripts to a unique name.
Scripts named 'TimedObjectDestructor.js' exist in multiple locations (Assets/Standard Assets/Particles/Legacy Particles/TimedObjectDestructor.js). Please rename one of the scripts to a unique name.
Scripts named 'TimedObjectDestructor.js' exist in multiple locations (Assets/Standard Assets/Scripts/TimedObjectDestructor.js). Please rename one of the scripts to a unique name.

Further you seem to have some bad file names

'Assets/Standard Assets/Skyboxes/ Sunset.mat' is not a recommended asset file name. Please make sure that it does not start with a space or contain characters like ?, <, >, :, *, |, ".
'Assets/Standard Assets/Light Flares/ Sun.flare' is not a recommended asset file name. Please make sure that it does not start with a space or contain characters like ?, <, >, :, *, |, ".
etc..

And some settings to deal with:

The font Assets/Standard Assets/Fonts/Courier.dfont does not support dynamic rendering. Please use a different option.

And more stuff…

Updating Assets/battery.obj - GUID: 3d7345ab01f311d4fafbf3478f18b993...
ImportFBX Errors:
Unsupported wedge mapping mode type. Please report this bug.

Here’s what you need to do. You need to go through each error or warning and try to fix it. Usually the log will tell you what to do, or give you a hint about what to do. If you have a specific error that you can’t solve, then post a clear question about how to proceed fixing that problem. It would also help if you said what you did just before you got the problem. In this case it sounds like you have imported a package that contained scripts that already existed in your project.