Importing the Gulp plugins

Good day everyone,

I am new in the GULP and Drupal. I got the Git repository which I have used to import the drupal site. Now, I have put the site on the local host. The site is only showing the html, no images and no styles. I think the one problem would be with the GULP.

Do I have to install the gulp again in the site folder because I have not init the npm in that folder through my computer but I do have the package.json file which I got through the repository.

and also do I have to install all the GULP plugins again on my computer because I got all the files through the git repository.

Please from the below list only consider the name of plugins

  sass              = require('gulp-sass'),
  autoprefixer      = require('gulp-autoprefixer'),
  minifycss         = require('gulp-minify-css'),
  imagemin          = require('gulp-imagemin'),
  rename            = require('gulp-rename'),
  concat            = require('gulp-concat'),
  notify            = require('gulp-notify'),
  cache             = require('gulp-cache'),
  plumber           = require('gulp-plumber'),
  livereload        = require('gulp-livereload'),
  del               = require('del');  

via Mohsin Younas