For the first texture example you could basically take a few rock textures, blend them together and extract height and normal information. Then, make a Moss substance and blend those two together with a noise mask for example. That way, you end up with two nice substances that can be reused in other projects.
It depends how deep into Substance you want to get. I agree with Chimps approach, definitely if you're just starting out. But if you are determined to make it all procedurally, it is possible, it will just take a long time and a lot of determination :) . Do you have any examples of some of the surfaces you are trying to…
Dude, are you high? You linked to textures from the website that he owns and you are calling him a loser and a spammer for posting other examples of similar work from the same site. It's even in his sig, man. Remember that the games industry is a very small place and it's easy to get blacklisted real fast if you are a rude…