Originally Posted by waelaltaqi
Well, you are asking for so many big things at once. You have to start step by step and we will help you out.
start by making the server see the network. Try to ping other local ip addresses on the local network.
It would help if you list out what you expect to do on this server. For starters, you probably will need build-essential, so you have the tools you need to build other packages, if they are not in the Ubuntu archives.
sudo apt-get build-essential
You use the password of the user currently logged in, if they are in the sudoers list /etc/sudoers. The user who installed is by default on this list.
What services are you going to run: apache, samba, ... ?
Don't forget app-install-data-commercial, which includes useful utilities like unix2dos.