Richard is correct about the APR. Additionally, you shouldn't have to give any RESPA disclosures on an open-end product. The booklet, mortgage servicing disclosure, GFE & HUD-1 are all exempted for open-ended credit.
I think that you should give a final TIL (again, use the open-ended disclosure requirements of 226.6. The RofR issue is something we have debated here often. You can do a search for "correcting errors," "right of rescission late" or similar posts. I am in the "you can't fix it now" camp, but I know that many other BOL posters feel that you should try to get them a RofR. If you have already advanced the money, you can't give them 3 days before advancing now.