As F-F states, Ctrl together with + makes text bigger (in all of the well-known browsers). Ctrtl and - makes it smaller. Ctrl and 0 takes it back to the default size.
To show the Bookmarks toolbar, right-click on a blank space alongside 'File, 'Edit', etc and put a tick in the appropriate box. To make use of it, see here:
https://support.mozilla.org/en-US/kb/bookmarks-toolbar-display-favorite-websites
To get to your Home page, click the 'House' symbol, near to the top right of your screen. To change your Home page, go to Tools > Options and (if necessary) click on the 'General' tab.