Does taking courses at night school and summer school affect University applications?

I'm a grade 11 student in Ontario. I have ESL courses instead of grade 11 English in this school year since this is my first year in Canada. I don't know whether it's a good idea for me to take ENG3U in summer school and ENG4U in night school. I know the marks are much easier to earn, however, a friend of my told me that courses token at night school and summer school will affect my university application. Is that real? Do universities really care about the reputation of students' high schools? And I'm thinking about applying U of T for engineering. In their website, it's said that "The “out of school” component of Grade 12 U/M co-op courses will not be accepted for admission purposes". Is that inferring that any out of school courses could have the same problem? PlZ give me some advice. I'm really confused. Thanks.