There is a TDC mark on the crank pulley and also the crank timing belt sprocket, but they are there to aid cambelt replacement.
For just a chain replacement, all you need is the cam locking tool. If it drops in with no resistance, then the timing for that end of the engine is correct.
If you need to set the timing up from scratch, then yes, first you would align everything at the cambelt end with Cylinder 1 on TDC, and then set it at the chain end.