I am fairly new to the guitar and play alternative music. Mostly Radiohead and Smashing Pumpkins. Are there any scales and chord progressions that i could use that will help me to play songs from these two bands?
i dont listen to much smashing pumpkins or radiohead, but alternative makes good use of the minor scale, and in grunge, almost anything can work. No scale or progression is genre-specific or band-specific. learn your theory, and learn their music, how their music works, and study the theory behind it, if you want to sound like them (although there are plenty of grunge songs that dont work theory-wise). thats my advice to you

Saying the Red Hot Chili Peppers have no talent is like saying Guy Fawkes didn't have an epic mustache.