For the aircraft in question, 777, there is a wheel to rudder crosstie for low speed cases (primarily allowing a little bit of wheel input to help control an engine fail) and there is turn co-ordination - controlled by the same system that does the yaw damping.
However, just like a PA-28 you can fly it with left wheel and right rudder if you want to! So yes, taking off a crab before landing is usually done with rudder, and often in the flare. Manual landing are allowed at up to 40 knots crosswing, if doing an automatic landing (allowed with up to 25 knots, or sometimes 15 knots, of crosswind) then the autopilots will straighten the crab a bit earlier (500-200 feet) and land wing low.
Hope that helps!