How do you know tdc

I am needing to sort the timing on my celica so am trying to set the engine to tdc. I still have the cover on and know to rotate the cut out on the crank clockwise to the 0 mark on the small marker above the pulley. I just want to know how do I know I have the right rotation?
The orange markers are miles out on mine so I am unable to use those.
Also just to double check is it right what I have found that it takes 9 rotations for the chain to match up to the marks on the cam sprockets.