Animations for combos and more.

I made a character for my game in blender. I still haven't made any animation for it because I want to know how to make the animations work in unity on the following cases:

1) When my character start walking it need to change the animation from "standing" to "walking" and from "walking" to "standing" when it stop walking. How do I make the animations that when the character finish an animation it will start the next animation from the exact position that the last animation stopped? Like, if the character stop walking and one of his hands was going forward when the "walking" animation stopped, how do I make the animations that the hand will move to the place it needs to be exactly from the position it stopped in the "walking" animation?

2) My character have a combo with many hits. I need to make one animation which containes all the hits in the combo and just stop the animation if I want to give one hit, or I need to make an animation for each hit and start the next one if I want to give many hits?

I asked this because I want the animations look "smoother" when I switch between animations.

Sorry for bad grammer and english.