FM Translators must broadcast everything that is being broadcast on the main (primary) station.

The only exceptions are as follows:

An FM Translator authorized to rebroadcast a Class D AM broadcast station may originate programming on the translator if the AM station only during the period that the AM station goes off the air at night.  They can't originate separate programming while the AM station is on the air.

There are two different types of translators, fill-in and non fill-in.

Yes, but your application cannot claim the 3 points for Established Local Applicant.

Remember that for the translator window, the 25 miles is measured from the reference coordinates of the community that the translator will service (based on reference coordinates that you can find in FCCdata.org by doing a search by community name) and not the community that the primary station is licensed to (or transmitter site in the case of LPFM stations). 

Channel 200 (87.9) is intended only for grandparented Class D FM stations that are being displaced as a result of a modification by a full-service (primary status) NCE station.   There are very strict limits on the placement of a Channel 200 displacement including a massive Channel 6 protection and since it's use for FM sound broadcasting is not internationally agreed to, no Channel 200 stations can be placed in the border coordination zones (within 402 km from the Canadian border and 320 km from the Mexican border).

No.  You may only change to one of the other 20 reserved band channels between 201~220 (88.1~91.9).