Doing front brakes soon, need some answers...

The races are pressed into the rotors. A hammere & punch is all that is needed to remove them. Use a piece of 2x4 to help drive them back into place. Some new rotors will come with the bearings already pressed into place.

Any of the high temp wheel bearing greases will do OK. Always get new cotter pins, they are cheap. The nut on the spindle only gets hand tight. Push against the rotor so that the slack is out of the rotor & bearings and then finger tighten the nut down so that the new cotter pin will slide in. The only time I use a wrench or pliers to tighten the nut is to get the last 1/1000 of an inch so that the cotter pin lines up & slides in. When you are done the is no preload and no slop in the bearing/rotor setup.