TTC is Transportation and Ticket Center (kind of a hub where people can get a boat or monorail or bus to other places within WDW). At WL there are two types of boats. One goes back and forth from the WL to the MK. The other boat goes from the WL to the Contemporary and Fort Wilderness. I think taking the boat would be easiest (and it's more fun, too). I don't know the answer to your parking question b/c I always use internal transportation. The whole transporattion thing sounds a lot more difficult than it actually is. Check it out when you arrive and make your decision then. I wouldn't worry about it at all.