Both species can breed at the age of 13-18 months.
But both species need a long acclimatization period if introduced to a new tank, independent from their age.
For goldens it may take 2-5 months before they start breeding in a new tank, for tokays it may need more than a year.
Some animals start sooner, but there´s not guarantee.
There are almost no female goldens in the pet trade. Females stay smaller, are less brightly coloured and have smaller heads but well supplemented speciemsn have calcium sacs at their cheeks. In male goldens you see stronger tubercles and hemipenis buulges at the tail base. From below, of course status of pores makes up the difference.
All this applies for Tokays as well, but its no colour difference in the sexes and you won ´t see hemipenis bulges in male tokays.
Hope that helps
Ingo