2 problems now i guess this happened when i ran the sudo apt-get autoremove... this is what is going on with my computer ok the applications on my panel is not even showing me the applications under the applications problem and my internet in the network settings it doesn't show the connectio wifi any more so how can i fix these 2 problems

If you log in as another user is it the same? Create one if you don't have one

yes its still the same... its saying i have no space left on the device which was after i installed the updates but all of the updates weren't installed saying it was a error or something but when i open up my update manager it displays a message saying E:unable to write mmap-msync (28 no space left on device). E:The package lists or status file could not be parsed or opened. E:_cache ->open () failed, please report.... and all of these errors that i'm getting on my computer can those errors be bugs?

sudo apt-get clean may help the space issue.

but i don't know another way to open the terminal since my "applications' sub menu won't open

actionparsnip uses to say ;-)

Alt-F2

A "Run Application" window should appear. Clicking there on "Show list of known applications" you can choose an app from the drop-down window, Terminal being among them.

Sorry for duplicating your answer, Steven Danna, it wasn't there when I entered this question.

ok i ran to clean thing in the terminal but im still having a problem when i ran the ALT + F2 and i clickedd the little box where it says so list of known applications but none are being shown so is there a way to fix this

Well try Steven Danna's advice, may be it'll work this way.
If the terminal does appear then follow the actionparsnip's suggestion.

i already did that...

Perhaps a more clear description of the current situation will help the situation.

From what I understand, the following is the situation:

1) If you go to the Applications menu on the panel, there are no applications listed htere.
2) The NetworkManager applet is no longer being displayed. (This is the applet that allows you to connect to wireless and wired networks.)
3) You are able to launch gnome-terminal by using Alt+F2

Can you confirm that the following three points are correct? If they are not, can you give a description of what you are experiencing.

Also, can you do the following:

1) Open a terminal (using Alt+F2) as above.
2) Run the following commands:

sudo apt-get update
sudo apt-get -f install
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get clean
sudo apt-get autoremove

3) Please copy and paste any errors you receive when running the above command in your next message here.

ok situations 1&3 have been solved for me now the only problem is my wifi or wireless network is not working when i click on the 2 computers combined icon on my panel it has the option of maually configuring network and im wondering is that how i set up my wireless network again or just another way to set up the internet

Regarding your last answer: rethink it and ask it as a new question if you don't mind.

Surely it's a new quest for me.

Thanks Steven Danna, that solved my question.