First, in your heading you wrote "were to start" and in the body of your message you wrote "we're to start."
One thing we need for reloading is consistency. The word you wanted was "where."
First, when you ask a question of where to start reloading, there are two things to know right from the start:
a) almost all forums covering reloading have "stickies" at the top of the forum postings that cover all your questions
b) those on the forums are almost always convinced that every tool they have is "required"
Any of the kits will give you everything you need to start reloading. However, the best thing you can do is buy and read a couple of manuals--say, "ABCs of Reloading," "Lyman #49," and Richard Lee's "Modern Reloading 2nd Edition, Revised." The Lee volume is particularly good if you are buying Lee equipment or you simply want a compilation of a LOT of safe loads in one book.
Now, for straight-wall cases, like most pistol cases, you NEED a press, dies, some tool for powder charges, and some tool for priming. You can load the rest of your life with just the Lee dippers and the Lee manual for powder charges. You will only be loading, in almost all cases, light starting/target loads. You can load the rest of your life with no more than the Lee Auto Prime XR Hand Priming Tool or the Lee Ram Prime Priming Unit for single stage presses. You will never need to trim a case.
Beyond that, most people want to try various powders, powder charges, and bullets that are not fully covered with the limited data for the Lee dippers. At this point, you need a scale/balance to weight out the powder charges.
Then, since that is very slow (unless you buy an electronic powder dispenser), most will move to a powder measure. This rounds out all the equipment you will NEED. A 6" caliper and a 1" micrometer can be of use so you can record the COL that works best for each bullet you load for your gun(s) and to measure bullet diameter, but you can go your whole life without measuring these things--you may not get the most out of your loading, but you will still be loading safe.
For bottleneck cases, like most rifle cartridges, you will face the problem of case growth and neck thickening, which will require you to either discard cases prematurely or invest in cast trimmer and a neck turning tool of some sort. That is all you need for safe loading of bottleneck cases.
Just read the stickies and a reloading manual or two.
It isn't rocket science or brain surgery. It has been done for centuries and is amazingly safe--as long as you follow the instructions.