After starting TOAD you can choose which Oracle Home will be used.
I just manually made a copy oracle instant client 11.2 into the some directory of my local PC.
I setup system %PATH% and %TNS_ADMIN% variables into the User variables (Environment variables on My Computer).
Now when I run TOAD (10.6.1.3) I dont see any Oracle Home (connect using).
But when I run older version of TOAD (126.96.36.199) I see that Oracle Home.
Could you please anybody tell me what can I do to see it ?