The European ISO standardisation organisation sorted out the indicator stalk situation by deciding it should always be on the left, even in a right-hand drive car. Japanese and Korean cars took a while to conform, but they got there eventually. I was slightly saddened by this, having grown up with the notion that right is right in a right-hand drive car because that's where British manufacturers tended to put it. And they, being native right-handers, should know.
Actually my Saab 96 two-stroke – Swedish, left-hand drive and built in 1961 – has the indicator stalk on the right too, sharing that side of the steering column with the gear lever, but that's because it's an old Saab and entitled to be odd. No doubt some Scandinavian logic applied, given that old RHD Saabs have both those controls on the left. Anyway, the eventual ISO diktat pleased carmakers greatly, because it meant they could use the same stalk package for all markets and therefore save money.
Imagine, then, the brain re-programming needed to drive different cars when conventions were still fluid. It was not until the mid-1930s that the centre accelerator pedal, neatly and symmetrically flanked by the clutch and brake pedals, finally disappeared, and it may have lingered even longer in some competition cars. A gear lever was often to be found on the right, in a right-hand drive car, during motoring's early years, and the practice persisted in much later mid-engined racing cars because it made for a simpler linkage to the gearbox. The 1950s Riley Pathfinder had a right-handed gear lever, too, as did a few of its upmarket contemporaries.
A steering wheel, though, is surely a given, and always has been. Hasn't it? Not when cars were invented, no; the direction-controlling device favoured by motoring's pioneers was the tiller, a bar pivoted at one end as though controlling a rudder. I have driven two tiller-steered veteran cars. One was a 1904 Vauxhall, in (or on) which I put-putted part of the way to Brighton on the annual Emancipation Run, as the London-to-Brighton was originally called. This was a small, light car, whose tiller steering was very quick and accurate but lacked any discernible self-centring, so it called for much concentration.
The other was a 1904 Lanchester, belonging to the Jaguar Daimler Heritage Trust as it was then known. Lanchester, eventually absorbed by Daimler, was a particularly innovative and pioneering company thanks to the creative genius of Dr Fred Lanchester, and this 1904 machine illustrated well his compulsion to do things differently. So its 2470cc, four-cylinder engine had new-fangled overhead valves, and it sent its power to the wheels via an epicyclic transmission controlled by a large stick. This kept the left hand occupied while the right hand was on tiller duty.