Go download Cheat Engine 5.5 do a couple of the tutorials just to get used to the set up, itll only take like 5 minutes.
The address for gold is 259EB558 it is a 4byte value. Find it and change the value to whatever amount of gold you want.
I am still extremely new at Cheat Engine so I havn't found anything else yet. It gets much to confusing when it goes into floating values and all that crap. Good luck and feel free to post any others you find!
BTW the one they have listed on the Cheat Engine site is for a different version and so far none of the address they have listed work that I can tell.