About Star Ocean: Till the End of Time Director's Cut

healing/energy stations - blue symbols on the ground which are free, and inns which cost little to use.
grinding - although you can avoid most battles in the open, you'll have serious issues later on. Such as 24-25 level character being unable to defeat the sub-boss on the way to Marquis. Regular enemies on Barr mountains being too tough at similar level, level 30 being insufficient for the first regular enemies on the second disc (they're effectively harder than the Marquis boss battle you recently beat).

-- creatures seen only briefly (not worh tagging)
skeletons, giant chameleon-like creatures, giant porcupines, giant spiders, bats, some dog-like creatures, flying giant fish, giant horned tortoises, witches, treants, lone fairy, plant-like tentacle creatures, frog-like humanoids, lizardmen, mycoids, caninoids, inorganics (rock/soil and crystalline), and some others. generally speaking, it's a mishmash of seemingly random "monsters" working together against you.