Serious? Cracked foundation and step cracks on wall

[Travis Sun]

The foundation is block and it is cracked like the following image (not filled):
http://www.pioneerwaterproofing.ca/blog/wp-content/uploads/2013/04/crack.jpg

The exterior walls also has 2 sets of filled step cracks like the following image:
http://home1.com.au/v/Victorian-House-Inspections-4308/photos/wall_cracks.jpg

Both the foundation and step cracks are on the right side of the house.

How serious do you think these cracks are? And what is the cost range for fixing it?

Thanks in advance

[Travis Sun]

I just spoke to a contractor (he offers waterproofing services for foundations - so I question his expertise).

He said that because the foundation is block, the blocks will shift at different speeds - thus generating the cracks.

What do you guys think?