Ignoramus,

You have a plan but have no basis for a plan. No one here knows what you
soil conditions are so no one can give you good advice. Let's go through
your questions:

1. Kill weeds with ROUNDUP. Wait 2 days.

The directions on the bottle should be followed.

2. Rent a TILLER and TILL the area, and level it (it is uneven).

After a soil test and the addition of any needed chemicals or fertilizers
tilling and leveling is ok

3. Sprinkle a layer of TOPSOIL

This makes no sense unless the soil test suggests that you have no top
soil

4. Spread high quality SEED

This is correct but when will you do this? Now may not be a good time for
planting in your area

5. Sprinkle more TOPSOIL

No, this doesn't make sense

6. WATER the area on a 3x Daily basis for 1 month

This sounds like too much watering.

There should be a local office of your State's ag extension service. Call
them and get expert advice suited to your soil and your climate. They'll
probably test your soil for free but now is the busy season so don't expect
your test results anytime soon.

Good luck,
Dave M.