You might want to take a look around at the stores when your in there shopping and picking up goods. Around this time of year, they usually have a sale on sporting goods, also if you have a sears close by they have one of the lowest prices on dumbells that I've found. For the stretchy bands look around, you can usually pick one up for $3.00 or lower. Which would just leave a barbell for you, and I'd just use the dumb bells to replace it. Also if your just starting off, and haven't baven't been working with weights, you may not even need them for a couple of weeks until you get use to the program. I always coach on knowing the workout before you add any weights to it. This you'll be in right form and you'll get a better over all workout when you start with weights as you know what to do next. A set of 10 lb weights is $16 at Sears, and if your not use to weight you might want to try lower anyway, will just depend on what you do at the gym and how the workouts feel to you.
Good luck and have fun working out.
Kit