If you want to get a high score (in the TOEIC test), you need to study efficiently and put in more effort than everyone else
「高得点を狙うには」＝ to get a high score (in the TOEIC test) / If you want to get a high score (in the TOEIC test)
「効率よく勉強し他人より努力する事」＝ you need to study efficiently and put in more effort than everyone else
「高得点を狙うには効率よく勉強し他人より努力する事」＝ If you want to get a high score (in the TOEIC test), you need to study efficiently and put in more effort than everyone else
ボキャブラリー
「高得点」＝ get a high score / score highly / get top marks
「効率よく勉強する」＝ study efficiently
「努力する」＝ put in the effort / make an effort / work hard / do one's best
「他人より」＝ than everyone else / than other people
イギリス 
