Will a dealer give me a better price if I pay cash?

Not usually. Dealers often earn money on arranged financing, so a cash buyer can actually be slightly less profitable to them, and some advertised prices assume you finance through the dealer. That doesn't mean you'll pay more, but you shouldn't expect a cash discount. A common approach is to agree on the out-the-door price first, then discuss how you'll pay. Read any advertised discount's fine print for a financing requirement.