How to connect a phone line?
Those are RJ45s not RJ11s. RJ11's only have 4 pins. An RJ11 fits into the center 4 pins of this jack though. 

Q1 Whether one is left or right I can't tell but the top is definitely for one jack and the bottom is for the other jack. 

Q2 leave your white on 5 and blue on 4 like all the diagrams below. You can use 568A and the orange pair for the second line connected to 3 and 6 that would be the traditional second line color. The phone doesn't care which color you use as long as they go to the other end. 

Hopefully it is obvious that you will not be able to use these jacks for data even though they will accept a data plug. 

https://en.m.wikipedia.org/wiki/T568A/B#Wiring