What is the meaning of *TO LET* in an advertisment
I saw an advertisement from a book as below, but I'm not sure what it means. Could you please tell me, thank you!
50-Seater Restaurant
TO LET (1. What does here mean?)
Ideal for very experienced person looking to start up on their own(what??).
2. It means that they are looking for a person who has an experience, idea, and look for starting up their own (what?)