A) I've always thought that the Bhaalspawn should accelerate far beyond the standard NPCs in the game. Therefore from a plot perspective, all classes appealed, but from a gameplay standpoint I only preferred Warriors or Priests. Warriors due to the immunities they get (I suppose Ranger is excluded) and Priests simply due to the fact that the Forgotten Realms has some nice deities. I've not been too fond of multi-classes, due to the games being swarmed with them, for the most part, however I have grown particularly fond of dual-classes; their only setbacks being their Human-restrictions.

For this character I picked an Elven male. I'm tempted to go something with a bit more roleplay potential like a Lightfoot/Strongheart Halfling, but since I like <charname> to be superior and strength is necessary to this build, I figured I'd go with a Wood Elf male. The goal of this class is to easily mix ranged and defensive-melee combat without faffing around in the inventory, therefore no fighter kits appeal, so I chose base-fighter. I always approach fights straight up, so my rogues are always lockpickers and trapfinders, so if I had chosen Human, I'd have dualled into a fighter from a thief at level 6 with both skills maxed out.
As for stats, I can sit there and roll all day until I get the perfect roll; as I said, I believe the Bhaalspawn should be superior, therefore:
STR - 18/?? < Wood Elves are known for their strength...
DEX - 19 < ... and their grace...
CON - 17 < ... as well as their frailty...
INT - 9 < ... and for being less intellectual.
WIS - 12+ < It's always nice to have extra bonuses to saves.
CHA - ? (Preferably 14+) < On my run I managed to luck out at 18, but it isn't necessary.
Tomewise, I'd go for the constitution tome early on. The other tomes are not priority; get them as you come across them.
As for alignment, I chose Chaotic Neutral and used the 'Fighter 05' IWD2 voicepack to accompany it. I was thinking of using the 'Dick Tate' soundpack, but it screams evil too much for this particular character.
C) With the PG missile adjustment, adequate strength, con and base AC, my plan was to start off with one point in axes, one point in single weapon style and two points in bows. Versatility with accessibility. As I'd progress in levels (two-manning a massive majority of BG1 with Imoen alone (dualled to mage at level 6) for massive experience boosts in a shorter time), I could often rely on Imoen to take everything down as I switched to my melee weapon, therefore the single weapon style took priority over the axe or bow skills. The axe proficiency would come after that, with specializations/masteries following that in BG2. The plan was to focus on ranged with the knowledge that I could tank successfully against most situations.
D) First priority would be to get some levels, then rush around with a standard longbow until Imoen and I have enough dosh to grab a composite longbow +1 and a battleaxe +1. Ankheg plate mail does the job, found in the Nashkel farm, until I have enough to get a full-plate mail. I'd keep the necessary magical weapons for future RPCs (Warhammer +2 for Branwen etc) and only use them if they provide advantages against damage reduction. There's the battleaxe +2 in one of the BG inns as well as the must-have throwing axe +2 from Prat. On top of that, I'd seek out Bala's axe in Durlag's tower to deal with spellcasters. As for tanking, the sword & shield style only gives bonuses vs. missiles, so if I did find a shield that gave me +3AC or more, I'd happily equip it for big boss fights, although it would be unnecessary elsewhere. As I said: versatility.
Keep in mind the Axe of the Unyielding in Watcher's Keep in BG2, increasing his tanking abilities, as well as such things as the Elven Court Bow, Mana Bow, Taralash, Heartseeker etc. The most powerful throwing axe, indeed, would mean me taking Bhodi's route, but since the character would be more receptive to the Shadow Thieves, I'd have to make do with a +2 throwing axe, which is still an excellent damage-disher in ordinary fights where high enchantments aren't needed. I'm not aware of any freely-found throwing axes in TOB.
I'd max out protection items wherever I could, try getting some elemental resistances (mainly fire, for obvious reasons) and keep a healthy amount of potions with me.
There, that's my tower of text. I've yet to complete BG1 with this character but it's fun so far, two-manning sirens, greater dopplegangers, battle-horrors and hordes of ankhegs

. I just hope BG2 is even more fun.