@Anonymous1502 with regard to allen/hex keys
Go round your bike and note down (on paper
even) what keys you need. The most common is a 5 mm but there will be others: bottle cage screws, cleat bolts, computer mount fastening. A small multi-tool is easiest for carrying in your under-seat bag but if you only need two allen keys and a small screwdriver maybe that's easier (and what I do btw).
But for tweaking at home (for example removing, cleaning and refitting your seat post (have you done that yet?)) 'normal' tools, colour coded or not, are far easier to use. Ignore the 'torque' option - your bike is not carbon and so that just adds complexity and cost. And avoid the allen keys with 'ball ends': their use increases the risk of damage to the socket.