Below is my opinion:
With all the cheap surplus 7.62x54 around, it hardly makes sense reloading, unless you wish to cobble together some hunting loads or reload for greater accuracy. Reloading for 8mm Mauser and most other calibers make sense.
You should get at least two reloading manuals. I like the Lyman for certain, any other is a good addition. (i.e.: Speer)
You will need a single-stage press. A cheapee RCBS Partner Press is fine, but the more robust Rock Chucker will last a lifetime and you would likely not regret owning one, even if you upgrade to a progressive press at some later point.
In addition to the manuals and components (i.e.: bullets, brass, primers, powder) and press, a first-time basic set-up should include at least the following pieces of basic equipment:
Dies + shell holder.
Caliper for measuring case length and over-all cartridge length.
Lee case length trimer:the cheap "by caliber" type that you can attach to a drill.
Case lube + pad
Powder Weigh scale
Later, and a very nice "to add bits" include:
Powder measure
Hand-type primer seater
Vibratory Case cleaner
Cheers and good luck