My Sunday (Days of the week always have the first letter capitalised. Ie; "Sunday")

I woke up at 8:00 o'clock but only got up at 9:00 o'clock. I ate breakfast at 11:00 o'clock while I watched T8V with my brother and his family, who live in the north of Mexico City.

Tonight, we're going to eat at 8:00 o'clock so I'm going to let you go because it's almost time to eat.  (I'm not sure what you want to say here)

I didn't use Google Translate I prefer to make some mistakes and you to correct them. Thank you very much.
Regards

My sunday

I wake up at 8:00 o'clock and I got up at 9:00 o'clock. I went to eat breakfast at 11:00 o'clock. At this moment I'm watching TV with my brother and his family they live in Mexico City and their address is in the north of the city. We're going to eat at 8:00 o'clock in the evening so I'm going to let you because the hour for eating is very nearly.

I didn't use Google Translate I prefer to make some mistakes and you to correct them. Thank you very much.
Regards

My sunday

I wake up at 8:00 o'clock and I got up at 9:00 o'clock. I went to eat breakfast at 11:00 o'clock. At this moment I'm watching TV with my brother and his family, they live in Mexico City and their address is in the north part of the city. We're going to eat at 8:00 o'clock in the evening so I'm going to let you eat then because the usual time for eating is very late.

I didn't use Google Translate I prefer to make some mistakes and have you correct them. Thank you very much.
Regards

The last sentence was unclear.  I was not sure what you were trying to say.  

    My sunday

I woke up at 8:00 o'clock and I got up at 9:00 o'clock. I went to eat breakfast (or just "ate breakfast.) at 11:00 o'clock. At this moment, I'm watching T8V with my brother and the rest of my family. (Your brother includes your family as well, so it doesn't make sense to say "his family." They live in Mexico City, and their house (sounds better) is in the north of the city. We're going to eat at 8:00 o'clock in the evening, so I'm going to go because the hour for eating is very nearly here.

I didn't use Google Translate. I prefer to make some mistakes so that you can correct them. Thank you very much.
Regards

Very good effort. I hope you enjoy your meal.