That's hard, Im'sorry.
You may try hitting Alt+F12 to get the Krunner window, then issue "gnome-panel" (without quotes)
And about the wireless, when you get the bottom menu bar you will find a icon that looks like an ethernet port, click it and you should see the wireless networks.
Another option if you have your SSID hidden is to use the same icon and go to manage connections (or edit connections?) I have no mi KDE rigth now but is something like that