Hi Saumya, i have been to switzerland and Paris Last year. some of the places you must visit. Switzerland - we landed in Zurich and we went to all the places from Zurich namely Lucerne which is 1 hour drive, Mt. Titlis, Interlaken city, Mt. Jungfrau. You can also visit to Lindt chocolate factory outlet if you are a chocolate lover. Rhine fall is also a must visit place.
Paris : Of course Eiffel tower ( Please visit early , usually they have very long queue ) but watching Eiffel tower in the evening is something i can't describe in words. You can go upto 2nd level of the Eiffel tower to enjoy the stunning view of the Paris. Disneyland : Nostalgia, well this is something which i can't miss and i personally recommending you. it will take back you in your childhood. You can meet mickey and all your favorite disney characters inside. Don't miss the Disney Parade and fire crackers in the evening. 1 full day is also not enough because Disney Park and Disney Studio is located adjacent.
Visit to Champs Elysees, Notre dame cathedral and Le Louvre. You can also do cruise on river seine and visit Fragonard perfume museum. If you need any further details, just contact me.