If you've not been before 6 days for everything is impossible
The problem is the shortness of you trip - most of the multi tickets (better value ) are geared up for 14 days +, park day tickets become expensive.
Disney tickets are the most expensive
It really depends what parks you want to do
We have been over a dozen times (girls are now in their 20's) we skip Disney and just do universal as its more up our street - we usually buy a 14 day flex ticket giving us unlimited access
Check companies like attractions direct etc
A good sourse of info is http://www.thedibb.co.uk/forums/, I think it's even got a ticket comparison excel spreadsheet - any question you have will most certainly have been answered there
As for eating on International drive there are 100's of good places
We were regulars at Miller ale house - good food and drinks and extremely reasonable - 4 of us were eating within drinks for about £50
We really enjoyed https://www.chuys.com/- Mexican, again very reasonable
http://www.bahamabreeze.com/location...rlando_ct:text
Is really good too
Maybe a little more info on your party