They use their limbs mainly to walk and since they do not fly their usage of limbs are limited.
Fish
A tree.
Walk.
they cant walk
Reptiles that have limbs use them when them want to walk, climb, swim, or grasp.
you cant walk on wheels
Tiger quolls use all four limbs for walking, running and climbing.
you cant answer that it depends on how fast you walk
no stupid, its a fish (kingFISHer) of course it cant walk
A car
Their limbs are not strong enough to support them out of water.