1; The fuel for Trangia stove which you call "Meths" is called methanol or wood alcohol here. It is easily available in hardware stores. However, the way most bicycle tourists buy it is a package labeled HEET in a yellow plastic bottle 12 fl oz (350 ml ) in size. This is sold as a gasoline antifreeze additive but it is pure methanol. You will find this sold at any place selling auto parts or gasoline filling stations.
There is also a product called Iso-Heet in a red plastic container which contains iso-propanol. You don't want that one as it burns dirtier than the yellow can. https://www.goldeagle.com/brands/heet
Methanol sold in hardware stores will be usually sold in a 1 quart ( 950 ml ) metal container. Camping supply stores will sell it in the 1 quart or 1 gallon size as well. https://www.rei.com/product/837419/crown-fuel-alcohol-stove-fuel
Bicycle tourists tend to buy one or two cans of yellow HEET, keep it in the original package as their storage containers and buy them as you go.
2; Road would probably be the name we use for the path one takes to get somewhere, such as "Is this the road to Yorktown?" Pavement is the the word one would use to describe what substance the road was made of. Such as "The pavement on the road to Yorktown was asphalt." Sidewalk is the path adjacent to the road where pedestrians would walk found in cities and towns.