I want to know how much music I can transfer over to my laptob without losing any files permanently in the jubble trasnfer. So far I have 13 Gbytes. Is there a solution to this predictament?

First, what do you mean by "jubble transfer"? Secondly, it also depends on how you're transferring music and how much free hard drive space you have on your laptop. You could be transferring via USB flash drive (filling the drive with the music files, plugging the drive to the laptop and then copying or cutting-and-pasting the files to the laptop) or simply a direct transfer to the laptop hard drive if it is connected to your home network.

Music is just data, you should not lose anything.

I would not use e-mail to transfer files. Most e-mail services will not allow you to transfer 13G. I would connect to the two PCs in a network or using a file transfer cable and copy the files that way.