Hi and welcome to the forum!
The Vampire Count armies are very much focused on two things: characters and static combat resolution.
Characters are the most important models of your army, even more so for any other army. Because without characters, your army has lack of march radius and if your general dies, your army starts to crumble.
Static combat resolution is the combat resolution you get for having ranks, standard bearer and outnumber. Coupled with fear, if you win a combat, the enemy automatically runs if he himself doesn't cause fear/terror or is unbreakable.
I'll let some others provide you with some more details on how to protect your characters and how to get the most out of static combat resolution. I've been out of the tactical zone for some time.
*moved to tactics*