Immature Wheat?

First three close up looks like what I call crabgrass. I grows from a central base and has multiple shoots. Bright green color. Does not send out runners that send down roots. Crabgrass is a summer annual and dies out in fall/winter. Pics 4 & 5 look like young Bermuda. It should have a blue green color and will send out stolons on top of the soil that will produce roots from every node. Here is a link that might be useful: Bermuda grass / crabgrass

Top appears to be frosted chives (Allium schoenoprasum, a perennial belonging to the onion family). Do not have a clue about bottom pic. Can you describe the flower or supply a photo?

Can't be certain at this distance. But look up nutgrass (aka nutsedge) http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7432.html Here is a link that might be useful: nutgrass