On the ftp problem: you may need to supply a user name and/or password for the server, in the URL. This can be done using ftp://user:password@host/path...
(or, with some servers, if you enter ftp://user@host...,
you will be prompted for further details). Type man ftp in the console for further details.
Changing the display resolution is simple (the following assumes you're using KDE): right-click on the desktop, select "Configure desktop" from the pop-up menu, and click on "Size and orientation". The panel will have a drop-down menu that allows you to select the size / resolution.