Tires and alignment are separate things. Each new tire needs to be balanced after being mounted on the rim. This makes sure they don't vibrate and wear unevenly.
Alignment on a car has to do with where the wheels are pointed. The angle of all wheels should be perpendicular to the ground under its own weight. The front and rear wheels, from one side to the other, should be pointed down two lines that are perfectly parallel.
Bad alignment on your wheels will show up in the tread wear. Wear patterns can identify what is wrong with your alignment.
Unless you are having tire wear problems or the vehicle pulls to one side, you should only need an alignment check when buying new tires.
Sam's Club does not do front end alignments. They do sell tires and if your tires are wearing unevenly, they can tell you if a front end alignment is recommended.
new tires. If the tires brake, you'll need it
When your tires have 2/32" tread depth left you need to replace them.
Yes
No, they do not just sell tires and batteries, NTB also has services for brakes and alignments and oil changes. They help with all sorts of car problems.
No the rims do not need to be replaced along with the new tires unless certain conditions require you to do so. The only time you need to replace the rims along with the tires are when you damage or lose them.
In my opinion the new tires go up front. The steering tires need the grip.
Yes, you can purchase used tractor tires, and do not need to buy new tires. Online, you can purchase used tractor tires at www.usedfarmequipment.net.
You will need to purchase two 24-inch bicycle tires for your new mountain bike.
I'd at least have it checked, just to be sure everything's fine
There are a lot of places you can get tires. But you should go to tire plus. They have a buy 3 tires get 1 free deal. And it doesn't cost that much. They probably do a alignments with it to. But try looking around you local tire dealers.