Question. A creature/mount that has arnor/barding about mpmbs-character-record-sheet

[magnusprime27]

Sorry , auto correct. Account should say ac.

[morepurplemorebetter]

The CreatureList only has an AC entry and the Companion section has no way to incorporate different armours other than manually changing the AC field. You could make a warhorse entry in the CreatureList with the changed AC, but it would be far easier to just select the warhorse on the Companion page and then change its AC.

[magnusprime27]

Question,
When it comes to ability scores,
[0, 0, 0, 0, 0, 0]
If you have save +2 dex, +1 con.
Its [0. 1, 2, 0, 0, 0] written as
" 'race': +2 Dexterity, +1 Constitution;"
Variant human is
[ 0 0 0 0 0 0]
Written:
"Human: +1 to two different scores of my choice;"

But what if I have a combination of both?
+2 dex, +1 con, and +1 to one other score?
Written as,
" 'race' : +2 dex, +1 con, +1 to one other score of my choice;"
Or do they have to be a separate entries

[morepurplemorebetter]

The numbers in the array are separate from the text that you provide. You can have the numbers only be added to the fixed values and in the text say that you also get to add something to another value. See the Half-Elf for an example of this.