Ok here goes, Lynx 50 bus goes from Downtown Disney and westside Disney, the Westside one is behind cirque du soleil walk through westside then around rear of building to the right hand side (north side) there are places to sit there whilst you wait there, the charge is approx $2 each we did not have to pay for 6 year old children. The bus stops outside Seaworld and opp renaisaance hotel, the drivers are good for telling you where to get off too.
I would then cross over road to catch the I trollet (You can google the Map) it goes all along International Drive stopping at attractions along the way, when returning you want to get the Lynx from the renaissance side of the road back to downtown disney,
Hope you can understand the above.
PS I trolley costs were a couple of dollars too - well cheap as opposed to taxi rides.