How much is the ticket price on a Saturday and do the reclinging chairs cost more or have to be something I would need to buy before hand?

Prices are usually 14-15 dollars. All the seats recline

Not sure of Saturday cost but all seats recline and don't cost extra.

You don't necessarily have to buy before hand, but if you know when you want to go it's a good idea, depending on how many people and what you are going to see as you have to select seats when you buy them.

Tickets are the same prices no extra charge for chairs