You can't limit the projects frames per second, but you can adjust the timing of the animations and speed of the movement to mimic what you want to achieve.
When you select an animation from the animation list you will see a speed attribute it the upper left. lower that number to slow down your whole animation.
also, each frame of your character's animation has a "speed" attribute that tells the game how long to spend on each frame. Click a frame and look for it in the upper left again
increase that number to adjust how long the game should spend on each frame of your animation.
using both of these you can slow down how your animations appear to play out.
as for how fast it translates across the screen, simply slow down the movement speed of the pathfinding.