Lanefan
Victoria Rules
Is there a minimum value, or does someone who starts with Str 8 and Con 10 end up with -1 BP?First I wrote the forumla wrong (bracket in wrong place), it is (CON mod + STR mod) x SIZE. Medium is 1 (L = 2, H = 3, G = 4). So for most humanoids it is simply CON mod + STR mod
Also, this must give Giants etc. a massive h.p. boost.

OK.Death at 0, no death saves. But you could add them if you want.
We don't other than the standard, you can say they are unconscious rather than dead at 0.
On the surface, and numerically, your system ends up hewing pretty close to what we've done in 1e forever: body points (BP).
They're rolled on a small die, with your Con score setting a floor value, such that most adventurers have somewhere between 2 and 5; barring something truly exceptional this is locked in for life once rolled. Death is at -10. On top of these you get your Fatigue Points (FP) which are the hit points you'd normally get by class and level. BP + FP = HP.
BP are harder to cure than FP. If you go to or below 0 you roll a consciousness check, it needs to be lower (on a d20) than your Con score modified only by your current h.p. total. Someone with Con 13 who's at -2 needs to roll 11 or less to stay upright. (there's various other rules around curing after going below 0)
Same here, except in some very uncommon situations.2) You take damage to HP first. When that is gone, you take damage to BHP.
Not the same here, and while it makes heavy armour more valuable I'd also be concerned it makes squshies just that much squishier.3)Any hit to your BHP, the damage is first reduced by your armors DR (AC-10). Since your BHP are so few it makes heavy armor more valuable.