Money is used to buy many things and pay for various options. Every unit or replacement has a cost in money, as most of the special options that the game offers (conscription or economic development for example), or even pressure to foreign countries (even if the main cost is in victory points and National Morale, when your pressure backfires! - more on this later). Money is produced in a few places, like your national capital, in financial places, or in California (gold mines), but you will mainly get money by using the Financial Options available to your nation.
Conscripts are the men drafted to fight for your Nation and are needed mainly for Infantry and Cavalry units, although other unit types need some too (the word is used generically because it also includes volunteers which are not technically conscripts). As with money, conscripts are not received on a regular basis (this is where we differ from all others games we believe), except in a few places like your capital, as a kind of 'bonus' production. Conscripts are in fact received by using one of the Drafting Options available to your nation.
Last but not least, War Supplies. War Supplies represent the heavy materials used during war. They will be mostly used for heavy ships and artillery but are also of use for infantry in lesser quantities to represent rifles and light equipment. Their production is more typical as you get them from your major cities and the output can be expanded if you invest a bit in the economy. Another possible source are the blockade runners for the South.
But let's not forget two others precious assets: supplies and ammunition. They are produced in each region and are distributed through your supply lines to your depots or your troops.

Detail on the assets board, with national stocks and productions (in parenthesis) , along with what is being produced in New York City, one of the few places on the map capable of producing money and conscripts on a regular basis.