I am more than happy to help you, truly.
I am always glad to see people try to bring youth into our hobby. The world’s greatest hobby in my opinion!
What you have is a project for an experienced postwar (1945-1969) Lionel technician. You will be hard pressed to even find a place to have it serviced. Some say they can service it, but few truly know what they are doing and the few who can and will do not work cheap.
Unless you are extremely fortunate to live near a Lionel service center that can do the work you will also have to pay for shipping to and from. Your project could become awfully expensive.
Save yourself a lot of disappointed faces, personal aggravation, and money, buy a new Lionel LionChief train set, the youngsters might love it.
LionChief sets have modern technology, remote control, sounds, smoke and more. Many can even be controlled with a Bluetooth app on a phone or tablet. In addition, they came with a power supply and snap together track that can run on almost any surface, in minutes. Best of all they are reliable, and they cost about $450 or as little as about $200 or even less!
I have 2 grandsons, my trains hold their attention for about 10-30 minutes, but they do like using my phone to run the trains.
In just a few weeks/months there will be many deals available at prices far below list price. If you are interested, pay close attention to the prices at Amazon or even Walmart online and others.
www.lionelstore.com
https://www.modeltrainstuff.com/trains/train-sets/#/filter:custom_scale:O/filter:brand:Lionel
https://www.walmart.com/search/?query=lionel train sets&cat_id=4171&typeahead=lionel
https://www.amazon.com/s?k=lionel+lionchief+train+set&crid=13FXUAEM7HR7A&sprefix=lionel+Lion,aps,342&ref=nb_sb_ss_i_4_11
O Gauge Electric Model Train Starter Sets
www.trainworld.com
If you find a set you like, search the internet before buying. There are many vendors who carry Lionel LionChief sets. I only listed a few that are usually the most competitive.
A starter set is a good place to begin and you can expand it to be as big and complex as you like.
You could even get an AC transformer to run your Lionel 244 locomotive with a 2224W tender and other cars on your starter set.
If you are good with your hands your best bet is to service your postwar Lionel train yourself. This book is a good place to start, but it probably won't be all you will need.
https://www.amazon.com/Greenbergs-R...MPZW1RA73TW&psc=1&refRID=5DESW27DVMPZW1RA73TW
I am sorry I cannot be more optimistic about helping you with your project. The truth is I think Lionel postwar trains are a PITA. Modern innovations and technology have greatly improved the reliability and performance of Lionel trains. Not to mention all the new "bells and whistles".
You might encounter some rare problems right out of the box, but Lionel will stand behind your new train and take care of the problem, no cost to you. I can attest to that!
If I can be of further assistance I will be glad to help. If you like I can send you my email address, but I warn you I can get busy from time to time.
You can even call Lionel directly, I have them on my speed dial! 586-949-4100 They are always happy to help.
I wish you well!