1. I'm not sure quite what you are asking here. If after installing suse, you open Chrome and it displays a SuSe logo with a Google search bar, this is simply a custom search page Google has provided for the distro as a default homepage. You can set this to whatever you'd like in the Chrome preferences. If you are launching Chrome and see a custom Suse page, this has possibly also been set as the default page and, again, can be changed.
2. As far as file management, all modern linux distros manage the filesystem through a shell. You can think of the shell similarly to what you may think of a MS-DOS prompt. The most popular shell is bash. Bourne Again Shell, is what this stands for. This is an updated version of the original sh. You can find more information on bash and working with the filesystem by using google to search for basic bash commands.
3.There are countless distros available. Generally speaking, distros are developed primarily to cater to a specific group or purpose. For instance, Ubuntu is marketed primarily as a desktop pc os, despite also having server and many other variants. Distros may also be targeted towards workstations, servers, or again desktop pcs. These distros can contain a graphical windows manager to provide a visual GUI that is generally very user-friendly with working with the operating system. The most popular managers are KDE and Gnome. However, some distros may not even come with a windows manager right "out of the box". In this case, you will always boot to a shell inside a terminal. Keep in mind, though, you can tweak any linux distro to make it whatever you want.
Hopefully, this answered some questions for you.
Last edited by dobry; 11-09-2009 at 11:42 AM.