magento2 setup and how to fix errors -Magento 2 installation using Composer

magento2 setup and how to fix errors -Magento 2 installation using Composer

Q1)Vendor autoload is not found. Please run 'composer install' under application root directory.
Ans 1)
 1) download lastest version of php 5.5.x
 2)MySQL Version : 5.6.x
 3) Install composer from
  https://getcomposer.org/doc/00-intro.md#installation-windows
  click on Composer-Setup.exe

Q2)Autoload error

 Problem 1
      - The requested PHP extension ext-int1 * is missing from your system


  Ans 2)
                     Enable extension=php_intl.dll in my php.ini works


Q 3)please create a GitHub OAuth token to go over the API rate limit

 Ans 3) Go to git account create a new token

  git is not recognized as internal or external command
magento2 successfully installed part3

Magento 2 installation using Composer