Translation:Tomorrow, I am going to drink this wine.
It's worth noting that this example makes use of 'futur proche' (present conjugation of 'aller' + infinitive action verb); commonly used in conversation when describing a future event
I can't speak for all users, but up until now, all of the examples I've encountered here had been in the present tense, so this is an important milestone :)
By context, the same way English speakers differentiate between "through" and "threw", "pair" and "pear", "new" and "knew", or any number of other homophones. In the case of this French sentence, "se" would not make sense, nor would "se" and "ce" usually (ever?) be interchangeable.