Welcome to the FTF. We have an area labeled "Introductions". A lot of good info will be provided to you there.
On what tools do you need? I hate to give "it depends" answers, but do you plan on specializing or general. How much machining experience do you have? How about measuring devices that get down to .001 in?
If you really want to exceed in this field, I would suggest attending an "in-resident" course on gun smithing, also.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)