The ending is used only with the verbs not with the adjectives, and it is normally used in colloquial settings.
The -(으)ㄹ래요 ending is a three-form ending: -을래요
is used after a stem that ends in a consonant, as in 먹을래요 ; -ㄹ래요 is used after a stem that ends in a vowel, as in 갈래요 ; -래요 is used for a ㄹ-irregular, as in 만들래요.