You can use audacity with a mic plugged into your computer. This tutorial is for podcasting but this page is still relative, just ignore the ID3 and hosting parts.
http://www.how-to-podcast-tutorial.com/17-audacity-tutorial.htm
Unfortunately you cannot and must have something to record with if your computer doesn't have a microphone, but you can use an iphone and upload its content and then listen to your computer.
Yes. You will need headphones for playback, and a microphone for recording. You set the recording software to use the microphone as the source, and turn off any loudspeakers during playback.
through her computer
She is going to record the song next week.
if you mean the cereal yes. the recording software never heard of it but can you use it to record a rock song if so then yes
as i understand you question u want to record audio in you computer without mic. you can use stereo mix option
you have to have a program. Once you have it and you know its name its easy. A free one that I like is audacity.
a dj vinyl is the same thing as a record you would have used in the 60s but the difference is it is usually connected to a computer and that allows you to use the same record for all your song database. Another difference is the fact that a DJ's vinyl would not get ruined when you scratch it whereas an original record would be damaged.
speakers
Use the computer
A downloadable computer recorder I think I'm not sure
there is a song!