I miss French Toast so much. The idea of putting jam on it is kind of gross though. I've never seen that done at home (US), where people seem to call it French Toast (most people I've talked to here don't know what it is).
At home I would put light butter on it, or maple syrup (which, again, isn't popular here). I've never heard of jam or tomato ketchup being put on it. The idea of tomato ketchup actually repulses me, in a way.
French Toast is made to be sweet, with vanilla, some light cinnamon, and milk added to the egg.
It depends on how you like it, I guess, but I'm fairly certain the traditional way to eat it is with maple syrup, butter, or both.