Will the canon fd zoom lens 35-70mm 13.5 - 4.5 with macro fit on a rebel xsi?

No. The two cameras have completely different lens mounts. IIRC, the only manufacturer to produce autofocus bodies that will accept manual-focus lenses is Nikon.
No. The two cameras have completely different lens mounts. IIRC, the only manufacturer to produce autofocus bodies that will accept manual-focus lenses is Nikon.