Brakes "skip" as I press down. Whats goin on?

That makes the most sense,warped drums. A partially engaged parking brake can warp a drum. A stuck brake cable is usually the cause. A two minute drive by someone with experience would pin down the problem.when you go for tires, have him take it for a drive. Then when he’s got wheels off maybe he can check brakes. A brake inspection isnt free,so be prepared to fork out some extra money. Also, it will have backwards threads on one side, be sure to mention that. You can verify this by checking the end of the wheel stud for an “L” stamped in the end of it. One side of car has left hand stud and nuts.

If you dont verify it,and mention it,and tire guy doesent think of it -it will cost someone some time and money.