All US industry still uses non-metric measure. This will not change anytime soon.
Usually the airlines themselves will personalize your luggage so its easier to find at the airport.
The weight of luggage usually depends on the rules of the airline. A lot of airlines also differ in terms of type of flight. Some give as much as 50 kls for luggage check in and a minimum of 30 kls.
The actual size limits depend on the airline itself, so you should check with your airline. But for many airlines, your hand luggage must not exceed 115cm in dimensions (sum of length + breadth + height) including any protrusions.
No, usually the checked weight is different from the weight of the hand luggage. Check with your airline
There are many airlines out there that offer discounts to Seniors. Please do not worry you have a lot of options. One site I can recommend is www.priceline.com They usually have a lot of good information.
Luggage now-a-days usually all come with wheels built into them.
The model number on Samsonite luggage differs from one luggage to another. It is usually a very unique number that is used in the identification purpose.
It might be wise to check with different airlines themselves or with the TSA directly. There are many different careers offered through many different airlines. Airports usually don't do the hiring.
Usually, in most cases, yes, this will not be a problem.
This will usually depend on the type of flight. The higher type like in Fiesta or first class flights the more luggage allowance for each passenger. Usually the economic flights have 3o Kg of free baggage for each passenger.
Your first item of luggage is usually free. More cargo hold items depend on the airline.
A suitcase is usually a rectangular piece of luggage, especially for carrying clothes while traveling. Luggage is suitcases, trunks, etc.; baggage.