Installing Drupal

I am at my wits end tonight. I am trying to launch a webiste that I have to have live today. The reason that it is so important is that it is my final project for my Bachelor's degree and it is due tonight.

I have done every tutorial I could find and nothing works. I have a freshly installed Drupal 7 on my server and have manually went in and added each module seperately. I did this because just copying out the files would not work.

I'm completely new to editing websites so bare with me if I sound stupid at times.

So I installed WAMP on my laptop to install Drupal. I extract the Drupal files into the WAMP folder and go to "localhost" on my browser. I click on Drupal under projects and I've gotten up to the "Database Configuration" step. I go to localhost again and proceed to "phpmyadmin" to create a database. I click on Databases but under Create database it says "No Privileges". Can anybody tell my how to fix this?

Thanks in advance!

Will I need to install a second Drupal to run the new site? I already have a server and a new DNS,
And, I'm not sure how to capture the existing pages from the first site and get them to the new site.

I choose hostgator as the company that I wished to host my site on a shared server using their business plan. They said drupal was fully supported and I have yet to understand how to read all the specs to see if it is what is needed for drupal. Forgive me for being a complete newbe here but the only way I could see how to install it was the 1 click drupal install. It worked great for drupal 7 but I wanted to use one of the community distributions.

Is this possible? I was looking at Open Enterprise but was worried that it hadn't been updated for over a year. This is going to be a community based site with blogs and discussions along with a paid services where users are allowed to sell/trade things.

Here what I thought I'd need:

1) Ability to make user accounts

2) Setup discussions kind like a forum but a little more open with a lot more choices and not blocked cell based. I'm thinking of a more open design that resembles craigslist.

3) A payment system that my host offers for free. I'm not sure if I'd be able to use it with drupal. Again, forgive the newbe question.

4) A slider box that highlights some of what goes on within the community.

So here is my Problem :
at first in my server I move folder Drupal to wwwroot/ ,so it was wwwroot/drupal . I should visited mywebsite/drupal to do the intall , and It was done .
then I realized I should skip off folder drupal , I then I deleted all folders and files in drupal , try to intall again , But there is some folders are still there , wwwroot/drupal /site/default . though it is empey .

and I intaledl Drupal from wwwroot/ again .

now when I try to intall Modules or Themes . it will pop out

Hey Guys,

I have problems lately with installing drupal 7.x. I already have one web site that is running on drupal, but i want to install the other one, and i have problems, because he wont recognize it. Now i have message
The webpage at http://mywebsite/install.php might be temporarily down or it may have moved permanently to a new web address.
Error code: ERR_CONTENT_DECODING_FAILED