No, it is not imagery.
Imagery would tell you how he looks specifically, these are all general observations. You cannot imagine him in a detailed manner with this info. Is he blond? Is he a brunette? Does he have pale skin? If we can't make an image in our mind, then it's not imagery. Imagery consists of SPECIFIC details. For example, imagery would be, "His eyes were a crystal blue, as if they were made of water. It seemed like you could jump right into them and swim for hours."
A run-on sentence is one that never ends, it normally uses 'and then' & 'and'
Answer:
a . tyler see outside his bedroom windw was to curtains
b . because dig sled out of the garage
c . tyler feel there being no school today because he feel
confident