There are barely any Hispanics in Ohio, and the few there are live in urban central Cleveland and Lorain. They are heavily Democratic. In Pennsylvania, Hispanics mostly live in central urban parts of Philadelphia, Reading, Allentown, and Lancaster. They were 80-90% Democratic already, Trump is not going to be remotely competitive with them. A lot of them are Puerto Rican. So any Republican will do terribly with them. Trump will do even worse. Hispanics in Ohio and Pennsylvania will vote for Hillary with percentages about as high as blacks.
Obama's share of the Ohio Hispanic vote was 65% and 54% in 2008 and 2012, respectively
(source: exit polls from NYT). However, like you were saying, there aren't a whole lot of them in Ohio. In 2008 / 2012, they only made up roughly 3%~ of the electorate. Pennsylvania Hispanics went 80% for Obama in 2012 and their share of the PA electorate has been growing relatively steadily.
Given Trump's rhetoric and plans, I seriously doubt he'll do as well as Romney did in Ohio with Hispanics. Any suggestion by the Trump campaign that he will rack up a big victory among FL Hispanics has to be a joke.
