Bought our youngest daughter an Ipod Touch ,so currently downloading Itunes on the PC for her right now, thing is ,its saying 12 hours 30 mins to download it

I dont even know if she needs Itunes, as she wont be buying tunes ?, she wants to download 'Limewire' and get music that way ,is this safe to do ,regarding getting ccaught for illegal downloads ,.....also is it safe regarding maybe getting a virus?
Ive just done a broadband speed test ,i'm getting a download speed of 3760 Kbps ,which seems fine .
Cheers