Recovered my scripts. Many errors

So, I accidently deleted my scripts folder from my Unity project. Fortunatly for me I builded the project not to long ago. I recovered all my scripts and they look fine, BUT I get for one script specific these compiler errors:

Assets/scripts/toggleYellowVisibility.cs(lineNumber,1): error CS1529: A using clause must precede all other namespace elements except extern alias declarations

-for every linenumber and the 1 next to the linenumber sometimes is a 14 and i get:

Assets/scripts/toggleYellowVisibility.cs(393,14): error CS0101: The namespace `global::' already contains a definition for 'scriptName'

-with scriptName being for every script

and in the inspector it says for every script that it is not valid and I need to fix compiler errors <- But, I can see why that is. EXCEPT: the scripts from the unity standard assets have this too!

and VS I get under variable names in my script this error: this member is defined more than once. Ambiguity between scriptname.variablename and scriptname.variablename

I don't get it! it looks like the scripts already exist nut they don't I accidently deleted the scripts folder!

PLEASE HELP!