I parted together my reloading components, starting with a press my father gave me. The kits will get you started. If you go with a kit, the RCBS or Hornady would be the ones I would get. My friend got the lee......I am really not impressed with it. Most components will need to be replaced eventually.
Your brass you have will be just fine. Don't worry about buying new brass, especially if it is fired in the guns your using it in, that takes away the point of reloading.
If you piece it together, this is my version of what aushunter1 said:
Solid press
Dies (and shell holders if they don't come with your dies)
Powder dispenser
Powder scale - balance scales work good for less money, but I prefer digital scales, but not cheap ones. My current one was $200 I think? and I want to upgrade to the FX-120i with V2 auto trickler system, but that is a LOT more $$$$
Powder trickler - I like the frankford arsenal, has a weighted base and stays put while trickling.
Quality Calipers
Hornady (or similar) headspace comparitor - Not 100% necessary to start, but will really help in the long run for consistency and increase brass life.
Chamfering and Deburring tool
Case trimmer, I use the Lyman E-ZEE trim. Works fantastic, and is cheap.
Case lube (possibly look at a rcbs stuck case remover as well, pretty cheap and very useful if you mess up)
Case cleaner (My frankford arsenal wet ss media tumbler is awesome) Not 100% necessary to start, but will be needed eventually, dirty brass scratches dies.
Bullet comparitor/OAL gauge (not 100% necessary at first, you can measure OAL with documented specific bullet length, but helps measure from ogive) I prefer this one:
https://www.brownells.com/reloading...r-hex-style-bullet-comparators-prod83792.aspx
As far as an OAL gauge, I have found a better way to find OAL to the lands, requires no tools, and is free!! shown here :
(as a side note, this method can also be used without tools to set shoulder bump exactly how much you want if you have a micrometer adjustable sizing die) However, it is only possible on bolt guns, and is a little more challenging with controlled round feed and floating bolt head type actions, as you don't have as much feel, but if you combine it with marking the bullets with a sharpie, you can get very precise, and I have found it to be much more consistent and precise than the hornady OAL gauge I have used, and that is even making my own custom fire formed case gauges. The second most consistent gauge I have used is this one :
https://www.brownells.com/reloading...lair-bullet-seating-depth-tool-prod35491.aspx and doesn't require any special tools, but it does have some quirks.
And by far the most important, a good reloading manual, and read it. Not just a data book, but an actual reloading manual that tells you the ins and outs of reloading safely.
Good luck, and enjoy!!