But it's much more exciting to do it under your own steam.
You can do the Luxor Temple and Karnak Temple quite easily by taking a taxi or caleche to the temples. The guide books are easy to follow and to be honest, if it's hot and you are going round the temples in the daytime - it can get very hard work. At least if you do it on your own, you can choose how long you want to stay and just how many pillars you want to look at
For a trip to the West Bank - you can take the public ferry across the river and hire a taxi and driver for as long as you like, once you reach the other side. Tell him what places you want to see first (agree the price of the taxi and his time before you get in), then he will know which ticket office to take you to. You have to purchase your tickets to visit the Valley of the Kings and Valley of the Queens before you get to the entrance.
Also, if you want to visit No 62 in Valley of the Kings (Tut's), you have to pay extra for that one. One ticket allows you to visit 3 tombs. It's hard work climbing down and back up again - so 3 plus Tut's is probably plenty on a first visit

unless you are very fit, of course!
There is so much to see in Luxor that you will surely want to go back again - so don't rush about trying to do everything at once! Take a nice relaxing cruise up the Nile to see the temple at Denderah and enjoy the trip along the river. Don't miss a trip below ground to visit the crypt and see the bats flying around. A full buffet lunch is included on the cruise and you can have a swim in the pool on the way back. It's not the cheapest of trips but well worth the visit.
If you're feeling adventurous - take a camel caravan before sunset along the West Bank through the local villages and see real life.
Best of all - take the balloon trip (book locally - with Jolleys) for a magnificent trip and at half the price than it will cost through your tour operator. Be warned though, it's an early start...
To me Luxor, Aswan & Cairo are the "real" Egypt and it's now our No 1 favourite destination. We've been to Hurghada previously and the Red Sea is superb but it will never hold a candle to the history of the real deal.
No 1 destination was always Cyprus, but now we live in Cyprus - so Egypt moves up to the top spot
Have a great time. Be brave and you will enjoy it all the more!
CwB