Tins are made (partially) out of tin right now!

A comment from the steel industry - tinplate is the primary material for food-grade cans (excluding most beverage containers). Tinplate is essentially just cold-rolled coil coated in tin (think galvanized, but with tin instead of zinc), and one ton produces about 15,000 cans. At my last read, CRC was going for about $550/st - spot buyer, non-contract. That's low, because the steel industry is going through a thing right now...but it gives you an idea. And most can producers likely obtain their tinplate via contract - so the price will be even more attractive. The most it would ever likely be is about $1,000/st - and I highly doubt it'll get back up there anytime soon.

Source on the amount of tin cans produced from a ton of tinplate

Nope.

Besides being expensive tin is soft, so it's usually combined with other metals in practical use, except where a soft metal is actually required.

The 'tin' in 'tin cans' and 'tin foil' refers to tin plate, which is a stronger, more common, metal or alloy, such as steel or iron, which has been plated with a thin protective layer of tin. The tin is used as it's more resistant to corrosion and it's shinier.

You can read more on the history of the tin can here http://www.bbc.co.uk/news/magazine-21689069