Turntable set up- How easy is it

Yes, definitely depends on the turntable and arm.

I agree with AudioConnection, however, it may be out of adjustment by the time you get it home. Setup requires time and patience (and a few tools)..time is not freely given from a store and expect to be charged for it. You don't mention your turntable... I find getting the cartridge wired is particularly nerve racking for beginners. Wire the cartridge first, pushing the wires on with your fingers...then attach it to the tonearm. Too many times, tools slip, and the connections are ripped off.

I live in North Jersey and second the Audio Connection recommendation. There is also a guy in Blauvelt, NY which isn't far from North Jersey who set up a turntable for me a few years ago he was very cool, Mark Gringer 914-907-7648 stbman@aol.com. Good luck

I decided to have a dealer, in this case also a distributor, to mount and align the cartridge in my Nottingham Spacearm. Those wires are very thin, the risk of breakin off the pins is high.
I could've done the alignment myself, but I would want something like Feickner protractor which costs more than what I paid to the dealer to have it all done.
Setting up the table itself should not be a problem with enough attention.
I am not the one who will want to change the cartidges often, probably once every three or five years.
Playing with VTF, VTA and bias can be fun though.

10-10-15: Papermill
My advice is to have a competent professional perform the initial setup. Learn how to do it. Future adjustments can then be done by you.

Isn't it's just simpler to go youtube instead?