The <<timed>> macro's documentation states exactly what parameters the macro accepts, you can't just add new ones and expect them to work.
Unfortunately it seems that the <<timed>> macro and the .typed module are not compatible, or at least I could not work out a way for both of their event timer based code to co-operate without having to modify their code.
The README.html file that comes with the typed.js integration module contains examples on how to modify the .typed CSS class so that it delays the initial start of the effect. I suggest you look at the example titled "To delay the start of typing for 800ms:" and change the value from 800 millisecond (0.8 of a second) to 5000 milliseconds (5 seconds).