Until you find a permanent solution to increase font size etc, you can try the followings........
1. If you use Internet Explorer > right click at an open spot where the menu bar is > click Status Bar.
Bottom right, you will see a xxx% > click the pointer and select a different %.
You can also click View > and use the Zoom option.
2.This one is best and easiest ........ If you use a mouse with wheel, press CTRL key and HOLD > roll the wheel counter-clockwise to increase size.
Not sure about " make pages FIT the screen" part.
Taskbar..... what exactly have you tried ?