F5 Refreshes current page. F6 Jumps to the Address Bar. F11 Toggles Full Screen mode. Page down Scrolls down, one page at a time. Page Up Scrolls up, one page at a time.
Space Scrolls down, one page at a time.
You can find more keyboard shortcuts for Internet Explorer by going to the Help menu, choosing Contents and Index and then looking in the Accessibility section. On the tool bar, you right-click on any 'blank' space, and then you scroll up to 'tool bars' and when the menu opens, you'll see the 'new tool bar option at the bottom of the list. In any case, you can simply click on 'My Computer' to create this new tool bar, and it will spread itself out. I usually will quickly go and change the settings to whittle down the size. You can always point your mouse over an icon to see which drive it anyway, so there's no worry.