Today's lifestyle uses a lot more electrical gadets than when your house was wired. The latest codes added requirements for AFCI and GFCI circuits, but as you indicated...you must get the latest info from your area as they may not have adopted the latest codes. You'll probably be adding a lot of outlets, especially in the kitchen, and probably upgrading your service which may require a new run from the power lines. There's a lot to this, and many opportunities to mess up. You'll probably want to install wired (with battery backup) smoke detectors while you are at it along with possibly CO detectors. Whole house surge suppression isn't a bad idea - electronics are in nearly everything you plug in, but point of use suppression is also desireable, too for the expensive items. Depending on how good access you have to the attic and a chase to get there, fishing wires in an old house can be quite challenging along with fixing the holes in the walls and ceiling when you can't fish around a corner. Hopefully, they aren't textured walls and ceilings! This is a major endeavor.