The series dates back all the way back to the 60's/70's right? Would watching this series be a good way to get into Lupin?
The manga was late 60s, and the first anime was early 70s.
If you're interested; the three original TV series, Castle of Cagliostro, Mine Fujiko to Iu Onna, Secret of Mamo, and Green vs. Red are all available on Hulu. Just understand that the original series has aged quite a bit, especially the first TV series.
Depends really. There are various iterations of Lupin, all recognisable by their jacket. Green, red, pink...and...blue? I think. Generally though, if Lupin has a red or green jacket you are in business.
There isn't really a blue jacket. The green jacket just looks blue sometimes, depending on the lighting, lol
Though, if you count the live-action film, then he's also had a white jacket.