Most of the names you give are derived from proper place names, or clan names, or such, so using "human" as a comparison is not accurate.
For instance, Vulcan and Minbari are named for their planets. We would capitalize Terran likewise (or Earthling or Martian).
Also Krell, Nox, and Timelord are groups of peoples (my apologies for not using a panxenic term, but "beings" was too confusing). We would likewise capitalize Irish, Passamaquoddy, Vandals, etc. (And naturally, Timelords are Gallifreyan, just as Mongols are Terran.) Or if you consider them more like ethnicities, you would still capitalize them, like you do with Jewish, Native American, Latina, etc.
Also, in response to Vulcans born off-world as still being Vulcans, I'd make the argument that Asians born in America (for instance) are still often called Asian, or Asian-American.
And finally, I think and I know I may well be dunned for it, that Cylon was a "brand" name for the original cybernetic organisms. And we would likewise capitalize Sunbeam, Keurig, General Electric, etc.
So then by example, human is not capitalized because it is not a proper noun, and not derived from a proper noun. Vulcans, Minbari, and Timelords are humanoid beings. There are also reptilian beings, silicon beings, and energy beings, but we don't capitalize any of those types of beings (human, humanoid, reptilian, silicon, energy, etc).
It is a good question, though. Here is a discussion that you may find interesting.
While I wouldn't dare to say that this is a 'rule', I would say that the definite article the is generally used before mass / uncountable nouns when you are referring to a specific instance of that noun.
In your example, you are referring to the Inventory and stock list amount, rather than, say, the purchase amount, or the sales amount, or the amount of your salary.
Similarly, you might say:
The twenty people on the course - as distinct from people in general (no article), or the millions of people not on the course.
The hospital staff - as distinct from The university staff
The river water - as distinct from water in general (no article), or from The lake water.
Best Answer
For buildings, there are no clear rules. We say “The Eiffel Tower” but there’s no the in “Tokyo Tower”. We say “The White House” and “The New York Met”, but there’s no the in “Sydney Opera House”.
In general, we use the for proper nouns denoting:
But note that we do not use the if there is an “’s” in the name, even when the apostrophe has been dropped. (St Paul’s Cathedral, Harrods Department Store, …)