Do you not see the TFR page on your left MFD, once you click on OSB listed as "TFR"? Once you do that, the page has a fairly complete listing of the abbreviations for all of the TFR functions. Without any guides at all those fucntions are pretty understandable, OSB 4 is a toggle for "OFF" and "ON". When you press it, you see over on the left panel above your Autopilot toggles the green "Active" light turn on. Over on the right side, OSB's 6-9 allow you to select what (radar) altitude above terrain you want to set. OSB 2 on top says "Soft" and toggles through Medium and Hard for, well, how rough a, er, ride you want. And OSB 18 on the left side of the page is your Standby button to toggle the TFR off temporarily while you take control of the stick - until you toggle it back on.
Did you try any of these yet? You can just go into the stock TE's and load for instance the SEAD Strike mission.