Wow. We need a lot more information to help you with this.
I suspect you have a novel antibody reagent that you want to characterize for binding to a peptide target (or series of peptides). Details on how to run the Western and ELISA depend heavily on characteristics of your peptide target, and usually somewhat less on your Ab. What do you know about the peptide (hopefully the sequence, or at least size and charge) and Ab (species and hopefully Ig class)?