1-
charged a interdiction drive up
activated it by right click (deactivation not possible, power consumption jumped up)
exited ship entered Core ship and charged drive and jumped one sector away
it seems i couldnt jump back to the interdictors sector imidiatly after.
when jump was again possible to the interdictors place the power usage was back to 0 (so interdiction not running)
2- obvious
3- not implemented yet i guess