Whats the best type of seed to revive my lawn?

I moved into a rental house and our back lawns 70% weeds 25% dead weeds and 5% grass. I've been watering to get the grounds soft enough for seeding, but am unsure of what to use, when to plant, and how to care for it after seeding. Can somebody with experience give me tips on killing weeds and making some soft grass for my kids in the back yard. Plus any tips on sprinkler system would be helpful. Thanks alot all you answerers.

Go to a hardware or farm store (Home Depot, Lowe's, your local garden center, etc) and buy some see. Depending on where you are depends on what kind of seed you should get- St. Augustine is a southern grass, Bermuda, Kentucky bluegrass, rye grass... check out this site or ask the people at your local store... http://www.allaboutlawns.com/grass-types...

The best thing is to seed. The more grass you have, the less weeds. Once the grass gets growing, it will choke out the weeds. If not, there are fertilizers that you can get that promote grass growth while killing certain weeds like crabgrass and dandelions.

So, you'll need-
~seed
~a seeder (thing to spread the seed)
~a good sprinkler
~patience!

Good luck!

Fescu grass seed. It is a hardy grass that spreads fast and can usually choke out the weeds.

go to scott's fertilizer web site and problem page..... what kinda grass is there and where in the US do you live? if you have st. augustine grass, you cannot seed it, you have to plug or sod it. i filled bare areas with plugs from other areas of my lawn but if you want seed then i love bermuda, but it really depends on your location. heat and drought will affect you choice.. fescue is probably the most economical one