Starting at first level
Ability Scores.
The player ranks the ability scores in DESCENDING order of preference (1 intelligence, 2 dexterity, 3 Con, 4 wis 5 strength, 6 cha for a typical wizard, for example)
You then roll 3d6 for each ability score.
1 best of 4 3d6 rolls (roll 3d6 4x and take the best)
2 best of 3 3d6 rolls
3 best of 3 3d6 rolls
4 best of 2 3d6 rolls
5 best of 2 3d6 rolls
6 3d6
If you end up with ability bonuses totalling less than 5 or more than 10 before racial modifiers, or if your 1st picked ability score is 13 or less, reroll the character.
Race: CRB plus tieflings, fetchlings and changelings. Half-orcs will be replaced by Calibans - statistically identical, but born to human parents. Be warned that Ravenloft is an extremely xenophobic place, and non-humans seldom receive a warm welcome. Each race has an outcast rating which applies as a penalty to Bluff, Diplomacy and Perform checks, but as a bonus to Intimidate.
Caliban* 5
Changeling* 4+1 for each Mother's Gift
Dwarf 3
Elf 3
Fetchling* 6
Gnome 2
Half-Elf 1
Halfling 1
Human (foriegner) 1
Tiefling* 7
* These races are considered monstrous by many and are rarely protected by the law of the land, or by any code of civilized conduct.
Classes: CRB & APG (minus Summoners - the Ravenloft rules about outsiders and dread companions make dealing with Eidolons far too much of a headache). Most Paizo archetypes in the PFSRD are valid. Certain class abilities will be modified to suit the setting, following the 3.5 Ravenloft rules where applicable. Where it isn't applicable, I'll figure something out.
Guns: Emerging Guns, but no Gunslinger class.
Feats, Traits, Spells: All Paizo feats, traits and spells in the PFSRD are valid, though many spells will be modified to suit the setting's peculiarities. These modifications will be made according to the 3.5 Ravenloft rules where applicable, and will otherwise be ruled on the fly by me. Disputing these rulings will drive me crazy, and will therefore be cause for madness checks at grotesquely unfair DCs.
Starting Wealth: Average for your class
Hit Points: Max at 1st level, best of 2 rolls at other levels.