You don't say which browser you are using, so here are a few suggestions for IE and Firefox.
For IE, place your mouse pointer in the toolbar section of the browser and right-click the mouse button. This brings up a selection menu of toolbars to toggle their display. Make sure you've checked the Menu Bar and Favorites Bar.
For Firefox, on the menu bar, click View then Toolbars. This gives you a selection menu of toolbars to toggle the display off and on. One of them is the Bookmarks toolbar. If you don't use the Bookmarks toolbar, then ensure that the Menu toolbar is displayed so that you can click on the Bookmarks option to get the list of your bookmarks. If the menu bar is also not displaying, do the same as instructed for the IE browser. Put mouse pointer in the tool bar area and right click the mouse to toggle the toolbar displays.