Serbian interested in sourcing Satin Dress

I am planning to establish a long-term children's fashion brand for girls aged 1-7.

I am looking for a reliable manufacturer in Turkey for children's formal dresses (ages 1-7), such as:
- Satin dresses

I would like to ask:
1. Do you offer OEM/private label production?
2. What is your minimum order quantity (MOQ) per model and per color?
3. What is the price range per piece for formal dresses?
4. Can you produce according to my designs, or offer your own models (ODM)?
5. What is the production time?
6. Is it possible to order samples before bulk production?
7. Do you have OEKO-TEX or similar certificates?