Novicef,
Sorry to hear that, but keep trying and keep sending in that resume.
Answers to your questions:
1) Unless you are in Phase 4 and teaching IFR then no they won't renew your instrument rating for you, and secondly no they won't let you borrow their senneca to do the renewal.
2) Last time I heard they still do instructor renewals, and have own ATO to do it, that is if MT is still around to do them.
Usually the upgrade is based on seniority, however if your rating is to expire and you have the requirements, then you could be pushed through for the upgrade.(however things could have changed since i was there, can you guys out there confirm this???)
3) The G115C are CSU 180hp fixed gear. Tas around 120kts and will comfortably climb to 7500' at 800-1000' fpm on a good day. I think then the G115B must be fixed pitch then???
Hope this helps
Cheers
ITS