If that kit is the RCBS Master Reloading kit, then you are looking at a great kit. The manual that comes with it-- the Speer Reloading Manual-- tells you everything you need to know to get set up and productive. It's not rocket science, it's more like cooking according to a recipe.
I started with the RCBS kit and it works for everything I load, except 45ACP, which I shoot in relatively high volume.
Expect to load around 50 or 60 rounds an hour with it. Some say you can do more, but you'll be working like an error prone fiend to do it. If you are shooting large volumes of handgun ammo, it can get tedious with this type of press and the next step up is a progressive press.
All you will need in addition to the RCBS Master kit is:
1) Dies for the caliber you're reloading
2) Shell holder for your caliber
3) Bullets, brass, powder, and primers (for .270 Winchester, strongly consider Hodgdon's 4831SC powder and Federal 210 primers. Winchester brass is very good too. Bullets depend on the purpose, of course.)
4) A Lee Autoprime tool (about $15) and Lee shell holder. This tool is far superior to the priming mechanism that comes with the press.
5) A dial or digital caliper. RCBS makes a great one. I prefer digital, just keep an extra battery on hand. Don't bother with the plastic cheapies. If you don't want to buy one now, you can buy gauges for your particular cartridge that indicate proper length.
It costs money to get started, but this is equipment that is both reliable and durable, and will last you a very long time.