Your beggining movement speed is determined by race.
Your movement speed can be altered by feats, or class.
Types of Movement
Running- Move up to your movement speed
Crawling, Climbing, Swimming- Move 1/2 your speed unless you have a movement speed for one of these.
Jumping – Requires a 10 ft. running start
Long Jump – jump up to your STR score in feet.
High Jump – jump up to 3 + STR modifier
You are free to break up your movement.
You have a movement speed of 30ft, you move 15ft to an opponent, make an attack, and after dispatching them, move 15ft towards the exit.