Believe nine tanker runs to LEO to fully refuel the Starship is the plan, based upon100 tons to orbit per launch.
[snip] Starship will be the world’s most powerful launch vehicle ever developed, with the ability to carry in excess of 100 metric tonnes to Earth orbit. [/snip]
Weird that the Saturn V booster orbited Skylab, a mere 77 metric tons, back in 1973. :^) That version didn’t have a third stage boost, the third stage was replaced with the Skylab inside 11K kg fairing that was thrown away. For Apollo, the payload capacity of the Saturn V was 140K metric tons.