disabled, Air Canada Vancouver YVR Canada in transit at PGV on route to BOM Mumbai Air india

Disabled Require and have asked the airlines both Air Canada AC25 and Air India AI349 for wheelchair/ electric buggy transfer
what should i expect in terms of Checked in baggage , carry on walker appliance
what time frame will the disembarking and clearing customs and rechecking and getting boarding pass require
will i have access to the business class lounge in proximity to the air india departure gate
Who will help me at the airport will it be Air Canada staff that are my principle carrier or will it be Air India staff that is an alliance partner or will it be PGV assigned staff .will i have to pay for the help i recieve?