Let me tell ________ you my hobbies.my favourite type ________ music

Let me tell you about my hobbies. My favourite type of music is rock.

Explanation:

1. We do not use "to" after the word "tell" and its forms. We use "to" after the word "say" and its forms.

2. We use "of" because of possessive case. We also can use apostrophe, but the phrase will be modifyed. For example, "the musics type".