Where can i get Drupal 5 version web hosting template and is this possible i can integrate Support ticket and billing software as well as
You probably want to use Drupal 6 as version 5 is rather old at this time and losing module support. A combination of modules including ubercart and ubercart ticket would allow you to build a support ticket and billing system. There are many other modules that you would also want to integrate to get functionality exactly as you want. It will be a complicated website to build, not the best first project with drupal to try to build yourself, but you can have something really powerful If you need a drupal developer that can build such a system send me a PM Good Luck with the project