Lead Vocal always one track or multiple?

I have a very cheap setup and can never get a single vocal track to sound loud enough. Is this because the setup I have just doesn't achieve this? It is because songs never have just one Vocal Track for Lead? Even if I am making a rap song it's not loud enough even though the levels are decent. Just trying to figure out what to do to correct this.



Does every song literally have another take or more layered (even for a rap song)???