Your glider hours will not count toward your private ASEL, but you should progress quickly because of your experience. Insurance companies will most likely treat you as a normal student pilot.
If you want to tow, most tow planes are tailwheel so you'll need to get that endorsement. Plus the towing operation will usually want you to have about 100 hrs or so tailwheel time for their insurance. You can tow for a club operation without a commercial airplane certificate, but not for a commercial glider operation.