A good day out from Tossa is to visit the Botanical Gardens at Blanes. You can get a bus to Lloret then another bus to Blanes, or I prefer to go by boat to Blanes. It takes about 45 minutes I think.
The gardens are up in the cliffs so you get a really good view of the coast and if it's clear you can see for miles. The plants are in sections according to the countries they are from and there are some really strange looking ones!
There is a stone staircase that leads down to a viewing point over the sea and it has lots of flowers either side, really pretty and good for taking photos.
It's well worth seeing the gardens, but hold your breath on the bus that takes you up the winding cliff path to reach the gardens - it's quite a ride!