Congrats! She sounds like a sweetie pie! My Maggie has never shown an interest in toys. Zero. Zilch. Nada. She will sometimes chew on a bully stick but even thats hit or miss. So this might just be your pups personality too. As for walks, when I brought Maggie home she was 4 and refused to walk on a leash. Just plopped her butt down and refused. But now she walks like a champ! For several months I carried her around the block to learn the sights, smells, sounds - and then sometimes I would put her down to sniff. Eventually she started walking on the leash because she was sniffing her way down the side walk. It took a long time, and is probably what i work on the hardest with her.
But at the end of the day if your pup uses the pee pads, is a healthy weight, and seems content, then I think thats ok. You have given her a nice safe home and good life