To (preposition)

1. Expressing motion in the direction of (a particular location).
2. Expressing the destination or recipient of an action.
3. Expressing a point reached or passed.
4. Expressing the infinitive form of a verb.
5. Expressing a range of relationships between two things.

Origin:

Old english tō, preposition expressing motion, direction, or purpose, also indicating an attribute or quality, adverb expressing movement or direction, going back to indo-european *de, *do, *dē- “to, toward, into”.

Examples:

1. She went to the store to buy some milk.
2. I gave the book to my friend.
3. The car drove all the way to the end of the road.
4. I want to learn how to play the guitar.
5. He is similar to his brother in many ways.