Even if I own the cds and or paid for the downloads? Joan
Of course not. When you purchase a CD or buy a download, you are not
of the music -- you are merely buying a license
to use it in various personal ways. These do not include public performance or redistribution to others, which your site would be doing. You would have to get a public performance/resale license from the music owners (like a radio station does) and pay royalties.
Most of the songs I want are old.
If they're sufficiently old (something your grandparents listened to, perhaps), they might be out of copyright and in the public domain. But you'd have to check on a song-by-song basis.