my clock and applications and everything from the top is gone aswell as seeing which windows are open from the bottom of homescreen. I know this will be simple but just cant do it.
I suppose you're using gnome-classic(?)
Hit Alt-F2, type 'gnome-panel' (maybe you have to tick 'run in terminal', I don't know)
If the panel appears, click on it with Alt/right-click or Win/Alt/right-click and you can start adding indicators