A big fuckin' hammer !!!!
Just to add to this:1. A good set of wrenches (no need to get a huge set, just the common sizes through 1")
2. A GOOD adjustable wrench
Everybody starts somewhere. Where did YOU start? At birth? I think not. If you think like this, then I feel sorry for you, starting anything new. I don't care how old he is, or if he has ever owned a bike. His interest is in starting, not wondering why he is starting when he is. If you only have this to comment, why did you even waste your time making the statement? But then, I try to help, no matter what your experience level is, or how many tools you have in your shop.Y'all got a lot more patience than me...
XL; if you haven't started buying & using tools yet, then it's already too late. Tells me you've never owned a bike. Any bike.
Just do it.