Hello everybody!

I would like to ask if 6 batteries connected in the row generate enough power for:

-2 DC 6V motors (https://www.pololu.com/category/60/micro-metal-gearmotors I really dont know which model this is, because I got ready part from the Uni and there is only a label which says: 09165, so let me know if you know what the model is.

2 Encoders (https://www.pololu.com/product/1217)

Arduino Romeo V 2.2

Raspberry Pi 3 Model B with Raspberry Pi Camera Rev. 1.3

If the power will be enough, my question is how to connect loads? (parallel or in series?).

My main problem is that I dont know for what should I look up in the description of the every product (for example for a motor.). I should guarantee the exact value for BOTH Voltage drop and Current to provide enough power and not to burn it, right? So how do I find the necessary from the product decription?