Hi April!
I leave Missy and Max home while I got to work and they stay in my bedroom. I puppy proofed my room so there wasnt any cords or anything dangerous they could get into. I leave them at home from 8am - 5pm. I've been doing that for the past 6 months and its worked out perfectly. I leave them in my room, with food and water in the bathroom tile area, they have their bed in my room and all their toys, I even leave the TV on low so there is some noise for them.
Can you leave toto in your room and ask your mom and brother to take him out of the room at a certain time to play with him? I also have a crate, they sell them at any pet store, you can even buy one online pretty resonable price off
www.petedge.com
I've noticed my yorkies do really well with a schedule, so maybe you can think of a schedule that will work for you and your family. Maybe you can keep him in your room in the crate or free to roam up to you from the time you leave to work till 2 when your brother gets home, your brother can let him free play for about 2 hours then put back in the crate till mom gets home then mom lets him out for 2 hours then back in till you get home etc. Thats just an example but maybe you can come up with something that will work for you.
If I were to crate my yorkies I would put their fav blanket in there and some water and some food.
Good Luck!!