If we are talking vintage, there are two main categories: Those using GEM blades and injector razors.
Using GEM blades, the easiest and cheapest are "1912" type razors. Brilliant little machines you can easily get for £10.
Another good option are GEM Micromatic razors. Dirt cheap in the US, still worth tracking them down elsewhere.
If you find injector razors more interesting, get an earlier E or G type model if you like more aggressive razors or a later I to N model for middle of the road.
If blade cost is an issue go for GEM and order a few hundred from
Connaught Shaving with reasonable international shipping.
Good injector blades are more expensive.
Personally, I'd go for... nah... I can't pick.
There are plenty of other options, but those are what I'd recommend for a beginner.
Keep in mind that you'll have to adjust your technique. Shaving angles are different but mostly more intuitive.