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/micrometalgearmotors
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 these 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?
I will use nonrechargeable batteries that means 1.5V more precisely this http://data.energizer.com/PDFs/l91.pdf . So far I understand that the voltage for a motor will be controlled by Arduino. If I provide enough power for Arduino it would just send it further to encoders and 2 motors. Is my assumption correct? There are 2 questions now, if the batteries would generate this enough power and how to connect Arduino to power source, through USB from Raspberry or parallel to batteries?
Thanks in advance for any kind of help!