It's so good ask for help when you need it. You will be a great mom for wanting to get advice from different sources to get the best options. For you issues, def call your pediatrician. You may also find a la leche volunteer to call online. Find the closest group anditshould have someone to call, maybe even a meeting location close to you. Also many hospitals have their lactation consultant available to call, some even in person. There are many resources wanting to help breast feed but sometimes you have to research your surrounding areas.
As for the paci, def wait until you are secure in the breastfeeding. Introducing a pacifier before being established can cause some issues with milk supply and baby confusion. As for the pump, tons of reviews are out there so I would just pick your price point and see what people say. Make sure you don't know anyone that may not be using theirs. Most of the parts can be sterilized.
As for the latching, please be patient. I promise breastfeeding is easier in the long run let alone healthiest. I myself bottle fed one and breastfeeding two so I can compare. With my dd no one, not even the lactation girl could figure it out. Finally I realized her bottom lip was under instead of out causing so much pain I was in tears. I pulled out her lip each feeding and in two weeks all was fine. Sometimes things just need a little tweaking.
My best advice is feed every single time right now. No schedule, just get her used to it and your milk supply up. Don't introduce the bottle until she is used to it. You can pump in between feelings to get a frozen supply started, but don't bottle feed her until she is a few weeks if possible. And my biggest piece of advice, YOU CAN MAKE ENOUGH MILK. I can't tell you how many people say they didn't make enough but the bottom line is only the tinyest percent truly don't produce enough. If you start supplementing your body will think its doing a great job and has no way to know it needs to make more. So then you supplement more. It's a vicious cycle. Give yourself time to adjust and get your body going before adding bottles, pacis, ect. Just nurse the baby on demand and in a month you should be a pro. Good luck with the latching, please don't get discouraged or let anyone make you worry(sometimes people who don't breastfeeding feel better when someone else also gives up). I understand you are tired and its a lot, but in the long run, it's quicker, easier, better for baby, saves you a ton of money and bottle washing.
Eta make sure you check freecycle, yahoo moms groups, ask in Facebook, ect for baby items. People are always getting rid of their baby stuff and are very happy to find someone who can use it.