Regrout, use tile paint, or apply peel-and-stick vinyl tiles. For a high-end look, try tile stenciling with waterproof epoxy paint.

Yes, but use a carbide-tipped drill bit for pilot holes. Seal around edges with silicone caulk to prevent water seepage behind the cabinet.

Yes, but you may need shims or a trim kit to ensure a level fit. Remove old caulk and check that plumbing aligns with the new vanity.