1.
Countable: piano, computer, car, lady, idea, doctor, fact, tomato, table, airport, cat, camel, instrument, bank, student.
Uncountable: всё, что осталось
2. food - potato, fruit - banana, football - goalkeeper, music - guitar, information - fact, electricity - lamp, traffic - car, travel - trip, accommodation - flat, equipment - telescope, money - banknote, work - job
Suitcase и loaf, возможно, лишние слова.