What do I do My cat wont eat anything except can food i heard to much wet food is bad never took to vet due to money issues i had him since birth he is to skinny what can i do?

canned food is ok as long as he gets enough and fresh water. Some people are fat, some are skinny - same for pets.

yes. and make sure that after the cat eats it has some water available right after he eats - but not in the same place as the food - cats like food and water to be separate for some reason.