Leather Interior cleaning?

[Chris_Rogers01]

Hey guys i picked up a complete set of EF Fairlane Leather interior and its been in storage for quite a while, so first thing i did is get a cloth and very rinsed out with water i got all the dust off, picked up Meguiars Conditioner and Cleaner for Leather today and some marks aren't coming off? is there any other cleaners or products i can use to help with this situation? i could take it to a auto upholstery dealer but im just wondering if this can be resolved without spending allot of money. i picked up the complete set for real cheap so im not expecting the best Cheers Chris

(one of these marks is done by a tyre from storage)
(other marks are just hard dirt and dust)