Let's take kazakh language as an example. In every source I've read there are 7 cases in kazakh language:
- nominative üi - a house, baqşa - garden;
- genitive üi-diŋ - of a house, baqşa-niŋ - of a garden;
- dative üi-ge - (in)to a house, baqşa-ğa - to a garden;
- accusative üi-di - a house, baqşa-ni - a garden;
- locative üi-de - in a house, baqşa-da - in a garden;
- ablative üi-den - from a house, baqşa-dan - from a garden;
- instrumental üi-men - with a house, baqşa-men - with a garden.
But I could distinguish at least 3 more cases:
- abessive üi-siz - without a house, baqşa-siz - without a garden
- essive üi-she - as a house, baqşa-sha - as a garden
- comparative üi-dei - like a house, baqşa-dai - like a garden
Are these 3 more can be considered as grammatical cases?
There are similar cases in turkish language:
İlgisizlik Hali (abessive) bahçe-siz "without garden"
Eşitlik Hali (essive) bahçe-ce "as a garden"