confused -4runner towing

for many yrs we towed a 5th with a f250 but last yr we switched to a
TM2720. still have the f250 which, of course doesn't even know the TM is back there. big increase in mpg which is still awfull.
bought a toyota 4runner 6cyl and am mightly confused with all this talk about weight distributing hitches etc no idea what most of the acronyms mean or what i need. the toyota manual says i need sway bars which i don't see mentioned in these threads. a neighbor had sway bars for his trailer and said they worked fine but seemed a pain to hook up.

opinions?
thanks in advance
jack