Hi sanvi,
Check this example. Now please take its reference and correct your code.
HTML
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.2/angular.min.js"></script>
<link rel="stylesheet" href="https://mbenford.github.io/ngTagsInput/css/ng-tags-input.min.css" />
<script type="text/javascript" src="https://mbenford.github.io/ngTagsInput/js/ng-tags-input.min.js"></script>
<script type="text/javascript">
var app = angular.module('MyApp', ['ngTagsInput']);
app.controller('MyController', function ($scope, $http) {
$scope.Fruits = [{ text: 'Mango' }, { text: 'Apple' }, { text: 'Orange'}];
});
</script>
<div ng-app="MyApp" ng-controller="MyController" style="height: 200px !important">
<tags-input ng-model="Fruits"></tags-input>
<p>
Values : {{Fruits}}</p>
</div>
Demo
For File Upload refer below article.