Apologies up front for my local attitude and having just come back from a dinner with a bunch of awesome wine..
If you want to do a shop , by all means, go visit, tell them you have a '14 tacoma, tell them what kind of lift you want (spacers vs. suspension) and plop down your CC.
If you want to order yourself, you have a couple of options:
-Springs and 5100s
I think almost everyone would say you don't need a diff drop.. ask anyone why, and you will get a multitude of answers (a lot of which is reflective of the main forum). Ask a bunch of us here if you can DIY, almost all of us will say yes cause you can..
Ask a bunch of us if we will help, and if you are serious and a good guy, most will come down and lend a hand..
As far as what to buy and part numbers, do your homework and it's not rocket science.. Get 5100s for a '14, do OME 885s (or 886 if you are getting a bumper, or even go ICON
if you ask Rick).
For the rear........ you have a couple more options to consider.. also, you may (depends on who you ask) would go for new U-bolts.. basically it...
I personally have offered a bunch of guys who said they wanted to DIY but have i guess decided it easier to go get a shop to do it. Kinda over offering to help then having guys flake..
DIY front. a bunch have done the LCA method shown by Luka. DIY rear, EASY.. a bunch of DIY threads on the main forum.