i echo what @John_E said: i did a setup the second day i started playing bass and again a couple of weeks later when i got new strings and the bass had settled in — it is extremely easy and there are a ton of good resources out there that walk you through it. i have no idea why people seem scared of adjusting the truss rod etc… i did buy a few tools in anticipation of needing them for setups but nothing major. for reference i got the following off amazon:
neck relief gauge:
action gauge:
neck rest:
and i already had hex wrenches, screwdriver, etc.