Renovation sofa armchair "teddy" brand pelletey

Good morning, everyone,

I got a 3-seater fixed sofa (190 cm) and an armchair (90 cm) model "Teddy" from Pelletey (brown color, full grain cowhide leather). Dating back to 1999, a new look is in order!

There are no holes but, in some areas of frequent contact, the leather seems a little worn/cracked (seat cushions and armrest edges). There are also several scratches and stains. In short, the marks of time...

Having never undertaken such a renovation and being a complete novice, could you advise me on the products to use and the quantities required, please? I will attach some pictures when the option is open.

Thank you in advance for your help.

Sincerely.

Caroline.