Trouble installing and starting ionic

am having trouble installing and starting ionic

PS C:\Ionic\lemmt> ionic info
[ERROR] Error loading @ionic/angular package.json: Error: Cannot find module '@ionic/angular/package'
[ERROR] Error loading @ionic/angular-toolkit package.json: Error: Cannot find module '@ionic/angular-toolkit/package'
[ERROR] Error loading @angular/cli package.json: Error: Cannot find module '@angular/cli/package'
[ERROR] Error loading @angular-devkit/build-angular package.json: Error: Cannot find module
        '@angular-devkit/build-angular/package'
[ERROR] Error loading @angular-devkit/schematics package.json: Error: Cannot find module
        '@angular-devkit/schematics/package'

Ionic:

   Ionic CLI                     : 5.2.0 (C:\Users\SUNDAY ETOM ENI\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework               : not installed
   @angular-devkit/build-angular : not installed
   @angular-devkit/schematics    : not installed
   @angular/cli                  : not installed
   @ionic/angular-toolkit        : not installed

Utility:

   cordova-res : not installed
   native-run  : not installed

System:

   NodeJS : v10.16.0 (C:\Program Files\nodejs\node.exe)
   npm    : 6.9.0
   OS     : Windows 10
PS C:\Ionic\lemmt> ionic serve
> ng run app:serve --host=localhost --port=8100
[ng] 'ng' is not recognized as an internal or external command,
[ng] operable program or batch file.

[INFO] Looks like @angular/cli isn't installed in this project.

       This package is required for this command to work properly. The package provides a CLI utility, but the ng binary
       was not found in your PATH.

? Install @angular/cli? Yes
> npm.cmd i -D -E @angular/cli
npm ERR! Unexpected end of JSON input while parsing near '...vVEyQy6v5lPzMqwHS1y2m'

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\SUNDAY ETOM ENI\AppData\Roaming\npm-cache\_logs\2019-06-28T15_30_44_450Z-debug.log
[ERROR] An error occurred while running subprocess npm.

        npm.cmd i -D -E @angular/cli exited with exit code 1.

        Re-running this command with the --verbose flag may provide more information.

I would really appreciate if someone can help me with solution on how to fix it, thanks