You apperantly are dealing with a commercial kitchen and it is hard to get past that look, however here are some recommendations.
1. Use Bar Keeper's Friend (a powdered cleaner) on all the Stainless Steel
2. Wash down the painted areas with a solution of TSP to remove grease.
3. Re-paint with an enamel gloss finish or latex enamel satin
4. The floor would be best with slip-proof quary tile.
5. New light fixtrues would add a lot.