Protocol of cylinder numbering is working from the front , generally where the water pump is, to the back, where the flywheel is. So as you suspect no. 1 cylinder is nearest the front. On a V engine just assume all the cylinders are in a straight line, and they would be l,r,l,r,l,r, depending which was no. 1 either to the left or right. On a transverse engine, let us say an old BMC Mini, that numbers 1 to 4 from right to left. Flywheel is on the left, waterpump on the right. An A150 169 mercedes engine has flywheel on the right, so numbers 1 to 4 left to right. In "Ye olde days " manufacturers would often stamp 1,2,3,4, to make life easier for the budding home mechanic. When you retime an engine after taking the distributer out, the rotor arm always points to no.1 cylinder, and HT lead should be sited there. Often at the car auctions, some scumbags would alter the plug leads to create a misfire.
Steve.