Church CICS r7 hit by lightning, someone donated DR5. All T7316 sets powered up.

3 trunks total,I moved 003 up and addded to sets.

1)Can't find how to have line 3, 2 then 1 be accessed by lifting the handset.
2) No hands Free on T7316 is it able?
3) Need to be interfaced w/ Aegis 7000 Call box, doable?
4) Connected M7208 set and it would not initilize, just all arrows blink

My use this til I have CICS repaired or replaced my need help with that too.

Thx all and Happy Labor Day!!