How early in the season can you lay sod? What should be the soil temp? How soon can dogs/kids be on the sod?
The soil temperature needs to be above 55 degrees F. for sod to take hold well. Spring is normally when this happens. While you can walk on sod after it has been rolled, you don't want to walk on it too much. Since kids and dogs tend to be rough on a yard, you will want to keep them from doing too much on the sod for at least a week, two weeks is better if you can.
I want to make a lawn.
I think this article will help you:
http://www.spokane-county.wsu.edu/spokane/eastside/Fact%20Sheets/C065%20Establishing%20a%20New%20Lawn%2009.pdf
I read how to level lawns using a 50/50 mix of sand and topsoil. My question is, what kind of sand is good for the lawn? I was told that I can't use regular sand, as it could burn the grass (too much salt, I'm guessing). What about the sand they use for cement mixes that is sold at Home Depot? A name/brand of sand and where to get it from would be greatly appreciated. Thanks.
Although it is a common practice when leveling landscapes, we do not generally recommend using sand for leveling lawns, unless there is no clay in the soil. The reason being that any sand mixed with a soil that has any amount of clay will result in the ground becoming harder and less ideal for grass (clay + sand = concrete). If you feel that your soil has no clay, then builders sand, which is available at your hardware store, is the best type of sand to use. Avoid fine sands like play sand, as you want a coarser sand for leveling.
Do you put the fertilizer or grass seed down first?
Put down fertilizer first but make sure to work it into the soil well before you seed.
What is the best lawn for a drought area?
To be honest, in areas that get little water, you may want to look at lawn alternatives. There is no grass that will do well without regular water.
You might be interested in xeriscaping concepts. You can learn more here:
https://www.gardeningknowhow.com/special/xeriscape/
I recently had a French drain put in my yard for drainage problems. Can I have the lawn rolled or will it damage my French drain pipe?
Lawn rolling is normally only performed under certain situations. This article will help explain when that is and how to go about it: https://www.gardeningknowhow.com/lawn-care/lgen/how-to-roll-out-a-grass-lawn.htm
I live in southern Ontario. When should I fertilize my lawn and when should I reseed?
This article contains extensive information on lawn maintenance in Ontario: http://www.omafra.gov.on.ca/english/crops/facts/08-017.htm