Removing Mortar on top of Brick patio

We're laying brick next to a 10x10 concrete slab. Is there some sort of paint/stain that can be put onto the concrete to make it look closer in color to the brick? Is it possible to create patterns?

There are several bricks in my foundation where the mortar has turned to powder and washed away. Is a professional required to fix this, or is this a job I can tackle myself? Thank you.

Had brick work done. Could not be there at the time. The mortar used is darker than the rest of the mortar on the house, which is white Question is, how can I lighten the darker mortar. Thanks Bill

I have a large brick walkway that, during the winter, gets real slimy and slippery. Rather than have it steam cleaned every year, is there something, such as washing detergent or the like, that I could apply to the bricks and scrub them clean with a stiff broom? I live in Portland, Oregon, where...