When your web services were established if you were self maintaining then you would have been sent an ftp Username and Password. This enables you to access your webspace and post your website.
The choice of ftp client is entirely yours. The example below details ftp access using WS FTP.

The details you are require to enter are:
Toucan Internet
Usually either 212.69.218.139 or 212.69.218.142 or your domain name or 'ftp.'yourdomain name.
This will be advised to you when the services are established.
Leave this set to automatically detect
This is the username supplied when services were established
Also supplied when services were established