I doubt is has been service recently. Looks like it was a daily driver and not used for years or decades. It's in decent shape. Everything works smoothly. No parts needed except handle bar wrap, saddle and a smaller frame that I could put all the gear on.

Considering reselling so I can buy a bike with shorter frame. Size charts indicate I need a 21" frame. I think I could go with a 22" one.

I have been using Raleigh girls 3speed for several years. too short and low is not low enough for hills around here.

Any greasing or oiling I should consider?

After several Schwinn balloon tire bikes and a Schwinn 3 speed I got a brand new 1961 Schwinn Continental 10 speed. I then bought a Mercier 10 Speed from Daniel Boone in Houston when I was in College. The World Sport is the first 10 speed road bike I have had in decades.