The Edge has (had) at least two Les Paul Customs that were (Alpine) white, not yellow.
That said, the topcoat on many Gibson and Fender guitars yellows over time. So this is why The Edge's 1975 (w/gold knobs that was auctioned) and his remaining LP Custom (w/black knobs, used often for Zoo Station during the Vertigo tour) have/had taken on a 'yellowing cream' hue.
As for the pickups, LP's of that era usually had T-Tops in them. ALthough, I've heard rumour that one of the two LP Customs had DiMarzio's put in but that has not been confirmed; to the best of my knowledge.
Also keep in mind, stock or not, this doesn't mean that Dallas has not altered/rewound the pickups. As per evidence in the Vertigo era tour Guitar World magazine article, some of Edge's guitars have 'custom wound' pickups.
Best wishes to one and all.