New homeowner and inherited bad grass

Hey everyone, thanks in advance for the help. We are recent new home owners and the grass and landscaping is on the next list of things to do. Was seeing if I could get some guidance on what’s wrong with our grass, seems to be dead patches? Is it salvageable with more watering? I have our sprinkler system set to 10 mins 3 days a week, but we are located in hot dallas weather. Secondly we had our front landscaping redone with a weed cloth and pebbles but weeds seem to be coming out? I’ve spread it with ortho sedge hammer but they won’t seem to go away, any suggestions? Thanks again everyone.