Camera only has “Put in inventory” option when set up on a tripod

Are you making sure to always click on the camera and not the tripod ?

As for the graphics message: That usually occurs if your graphics card isn't in the 'database' of known cards. This sometimes happens if the card is too new. If it goes away, you can just ignore it. The option basically helps with auto-setting your graphics settings. You can just adjust those manaully if they don't fit.