Instead of nutrical, if you don't know what that is, you can also give it some karo syrup. You can put some in the water, or let him lick it off your fingers. They must eat or get some sugar, or they will die very suddenly.
He is probably shy because he was kept in a cage and is not very familiar with being held. Give him his own little space out of the way where he can go and feel safe. A small crate or box.
Do not punish him for peeing on the floor, it will only frighten him, be patient and very calm. He will get used to his new surroundings in a few days.
Keep asking questions.
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