1) How many marks do I need to get in order t get into the college?
2) How much marks do I need to get in order to get into the college?
Does the 2nd sentence without the word marks sound better? " How much do I need to get..."
Sentence 1 is correct English, Sentence 2 would not be used.However you could make sentence 1 better, and simpler by asking
How many marks do I need to get into college?
"How much do I need to get into college" would be understood to mean "How much money do I need to get into college"
many vs much
?