Ghoti, Tapira, Quetzal and Chuchuana can be found for 110-200. You should also try the auctions if you want bargains.
The Cheapest petpet is a ghoti and you can usually find it on the shop wizard for about 10 or 20 neopoints
The Petpet Plaza is found by easily looking in your map on Petpet park.
At the Petpet Emporium.
You don't.
That petpet is called a Fungree.
All of the sailberries are located in Petpet Plaza, the place with the Petpet Mall.
Market Lane
No, but you can try to get your hands on a petpet paintbrush
shes in petpet plaza
you buy them from the petpet shops which are all over neopia
in the petpet station
You need to get a lucky zap from the petpet lab ray to paint your petpet gold. Its very rare though....