If you want to say you like something, you can use Mi piace... (one) or Mi piacciono... (more)

They can also be used on their own to say 'I like it' or 'I like them'.

 

Mi piace.	I like it.
Mi piace questo.	I like this.
Mi piace questa giacca. La prendo.	I like this jacket. I'll take it.
Mi piacciono questi pantaloni. Li prendo.	I like these trousers. I'll take them.