By the book, the answer is no because it is a VA flight and VA doesn’t interline with TK. It also answers your second question because with a wet lease, all of the handling, baggage, catering, amenities etc is the responsibility of the lessee, unless it’s included in the agreement.
The Finnair wet lease flights for QF have QF catering, bedding, ammenities and IFE. Everything on the ground including check in and baggage is identical to QF metal flights.
That said, the VA/QR lease agreement isn’t typical and is effectively a full QR flight. I think everything will be the same as QR, except the bags at DOH - that is an interesting question. There will be differences though, non-QR oneworld status won’t be recognised.