Baytril is an antibiotic not an antifungal, so it won't resolve the issue. Plus, Baytril can cause GI stasis and unbalance your pig's GI microbiome, so it's not typically a good idea to use it without first speaking to a vet.
If you can't afford to see a vet right now, there are a number of over-the-counter projects you might consider trying. For example, Athlete's foot and "jock itch" are types of ringworm (tinea pedis and tinea cruris, respectively), and a lot of products marketed for those two conditions seem to help treat the other types of ringworm. I would be careful using these, since some may be toxic when ingested. It might be a good idea to ask your pharmacist, or to phone your vet and ask for their opinion. Either way, be sure to watch your piggy so that he doesn't lick or rub it off. You should apply the cream at least every 12 hours.
You can also try some shampoos/conditioners. For example, 'Head and Shoulders' and 'Selsun Blue' blue contain ringworm antifungals. Again, its best to speak to a vet before going this route, but its better then nothing. Just be careful not to get the shampoo in your pig's eyes, and make sure that they are rinsed off well.
Abby had ringworm when I got her -- I used a combination of Lamisil cream (mine was a prescription, but you might be able to get it OTC, depending on where you live) and oral itraconazole, in addition to regular baths in Selsun Blue. It cleared up pretty quickly, and it hasn't come back (and hopefully won't

)