When you press /, you'll notice a little text bar will pop up showing the various radio commands. For example, / will transmit text only to your countrymen. Shift and / will transmit to everybody, Cntl and / will transmit to countrymen in your vicinity, and Alt and / will transmit to your squadron or your mission. You can change the various commands by using your mouse to click in each radio box and selecting a different "transmitter", so that Cntrl / will send to mission, Alt / will transmit to countrymen in your vicinity, and so forth.
To bale out, press "Enter" three times. I remapped my bale-out key to "E" - as in "Eject! Eject! Eject!". After you eject, you'll need to open your parachute by pulling the cord with "O" for "open parachute".