Rewards: 72 Gold, M$72,000
(There are no car-specific events, so only one car is actually necessary to complete the series)
There are 44 events - 33 Trophy + 11 TT - shared across eleven tracks, with each track hosting three Trophy events (cup-other-FE) and a TT. The track sequence runs Laguna Seca > Silverstone > Melbourne > Catalunya > Nürburgring > Berlin > COTA > New York > Hockenheim > Red Bull > Hong Kong.
You need to complete 2 Trophy events on a track before its TT will open, and all 3 Trophy events before the next track will open up.
Progress Rewards split:
25% - 9GC and M$9,000 [PR <58.0]
50% - 14GC and M$14,000 [PR <61.4, Berlin tiers]
75% - 19GC and M$19,000 [PR <64.6, Hockenheim tiers]
100% - 30GC and M$30,000 [PR66.9]
There are of course a number of combinations of Tuning/Driver/Principal possible...using Jaguar with PR63.9 full New York tuning only [so M$ only spend] I've reached 79%, and will complete later with more upgraded main car (DS).