it would depend on ur intelligence and talent. analyse it properly by taking different tests in which ur application skills are tested. if ur results are satisfactory, then u may try in 2012. if not go for aieee or cet or other exams that offer lots of seats(though not comparable to iits).
coming to ur 2nd question, i recommend bansal classes, rather than fiitjee. the fiitjee has less percentage selection in CLASSROOM COACHING than bansal classes. Further, if u are so interested to get into iits that u are ready to attend coaching for 12 hours a day go to narayana. however i don't recommend it as it is going to be extremely strenuous.