In the shop we don't touch trans hoses during a fluid service, nor any filter.
Simple drain and fill fluid.
Locate the dipstick for the transmission.
Locate a suitable funnel that will reach the dipstick tube (make certain it will do the job BEFORE you drain the fluid out).
Locate the trans drain plug under the car.
Remove trans drain plug using the square drive of a 3/8" ratchet (and maybe a short extension if necessary) This booger can be real tight, you may need some leverage.
Wipe off the magnet on the plug.
Reinstall plug and use a new gasket. Torque to spec.
Refill trans with 2.5 US quarts of Hondas ATF DW-1 trans fluid.
Cycle the shifter through each gear for a few seconds then return it to park.
Turn engine OFF. (Honda is the only car maker I knos of who wants trans fluid checked with the engine off.)
Use trans dipstick to check fluid level....within 90 seconds of turning the engine off..
If trans fluid is cool (<100*F), adjust level to the low mark
on the dipstick....and recheck later when the fluid is hot.
The level will rise a bit after fluid is at operating temperature, so you might drive it around town for 15-20 minutes then shut off and recheck level again.)
If trans fluid has not been serviced regularly I'd suggest repeat this procedure a few more times as you intended.
If the battery sat dead for a long time, it may have become sulfated ....meaning it may not be good ---even though it can start the car right now, if it sits unused it may self discharge in a matter of just days..
Coolant service @about 100-120k.
Brake fluid service every 3 years.
Engine air and cabin filters about every 25k-30k, pretty easy to pull out both and check before buying.
There is no serviceable fuel filter (it's built into the pump module in the gas tank)
spark plugs are serviced every 100k. (Wrong plugs might need replaced every 30k)
Coils are a common cause of misfire codes, but not the only possible cause.
I just did a valve adjustment on a Fit to fix misfire codes.