Help with Fuses

[aventur1]

Have a few questions on fuse box:
I'll refer to the drawing of the fuse box above. Went to wiring diagram and did a search but no where could I find explaining each fuse box connection. Yes some are straight forward but others are not.

Do I need to run a inline fuse for the cig. lighter and if so what amp?
Where on the fuse box do I plug into the blue wire from cig lighter for the light?
Are those terminals below where the cig. lighter goes unfused, is that why it says bat unfused at the bottom like for the glove box light and to run a 15A inline fuse out of those terminal for any accessories?
Whats ign. unfused? A hot wire, turned on by ignition?
Whats cluster feed? just a 3A fuse?
Says Radio with an arrow, is that where you plug i for hot for radio?
So whats the 3A fuse for above where it says radio?
Where it says dome, my dome light plugged in with a harness plug connection that came out at bottom of fuse block, so whats this dome connection for?
Whats spot LP?
B/U LPS fuse 10A fuse I assume for back up lights.
PNL lights assume is the 3A for panel lights
tail and stop..ok with that
wiper ok with that
traffic hazard ok with that
fuel gauge ok with that
I suppose it would be nice to have something that shows arrows pointing to each fuse or terminal explaining them...and if you need for safty run a inline fuse. Don't know maybe there connected in the back of the fuse block some how.