ask the airline
Just do not pack foods that need refrigerating unless you freeze it and pack it safely but airport security will still check this. Also do not pack items that smell.
Yes, you can pack knives in your checked luggage.
Yes. You can pack a blender and it is allowed.
Baggage is luggage used to hold your clothes etc when you are travelling. A back pack is luggage designed to be carried on your back.
If its in your checked luggage, not your carry ons.
Some things you should never pack in your checked luggage are money, jewelry, credit and debit cards, and travelers checks. You should also not pack prescription medication in your checked luggage.
in the carry on
No, it will not. Even sparkling wines are safe in the plane because they are not shaken nor is the temperature is high.
I highly doubt you can pack any food onto a plane if it was brought in outside of the airport.
Yes.
Yes, you can certainly take food on a plane, especially as airlines are providing less and less in the way of included meals. Just keep in mind that FAA regulations prohibit you from bringing on drinks or even pastes (like a tub of cream cheese).
Open rear tailgate, insert luggage, close rear tailgate... have a nice trip