Typcially not, as the start of the program is in winter/fall semester. 

Only in the case that not all places of the programm are filled (e.g. after drop-outs in the first semester), there will be an admisison in the summer term (in the past this happened rarely). To be considered for admission in the summer term, you need to have your Bachelor Degree completed and you need to submitt evidence that your study background can be considered equivalent to a student who has successfully completed the first semester courses of the MCNB.

Yes, the same semester fees and deadlines apply to all applicants.
Please note there are no study (tuition) fees, there are only semester fees. See the link below:

https://www.fu-berlin.de/en/studium/studienorganisation/immatrikulation/rueckmeldung/gebuehren/index.html

Each year Mid-April to end of May. The program starts on the following October