Joomla has 14000 files which will take a long time to upload my questions is that, can you upload .rar file to the server and then extract it there ?
You can. You can also directly download the zip file from Joomla.org and then unzip it in your server.
which host are you using? Most hosts with fantastico allow joomla installation in a couple of seconds.
yes, you can. why don't use Fantastico ? just some clicks and fill in the detail, and you're ready to go.
cpanel>fantastico>joomla 1.5>install no hah, well, yah do that its easier. i installed it once because i terribly misunderstood a template (long story) it took about 15 mins to install
Most web servers would let you do that, But for me i prefer to upload the files by ftp so i can check them and make sure everything is uploaded.
You can also use the cpanel file manager. Upload the tar or zip file of Joomla then use the File manager to unzip the file. Mark