I know that you can buy individual blocks, but can you also buy individual wheels, tires, axels & people...? & other type pieces? If so what kind of prices are we looking at?

I think so.

The people, I believe, are 3 for $11.99. As started in an earlier comment, can be customized with all types if pieces, hats, accessories, etc. They are mainly Lego City style people, though. No Ninjago, super heroes, etc.

There's a limited selection of common pieces at this store, so you may have to order online for more limited pieces. Prices vary from cents to dollars but within reason & then shipping. Check with an associate at this location to get a card & more info about availability and shipping.

The individual people, you can customize the way you want are about the same price as you pay for a unknown person you purchase at chain stores. Most all components are available to purchase individual, pack the containers to get the most for your money.