Advise If This A Good System ?

Awesome camera, average lens, I would get another lens for it personally. The Canon EF 50mm F/1.8 is very good the F/1.4 is one of the sharpest lenses you can get without paying a ton of money. Though get the best lens you can afford, the lens will out last the camera and all EF Lenses will work on all Canon EOS cameras. The Rebel uses the EFS mount which can accept either EF or EFS lenses, the EFS is designed as a slightly smaller diameter lens barrel that is cost effective. The very best Canon lenses are designated as "L" models for Luxury, there are very few of them that cost under $1000.00 they are worth every penny however. I have the EF100mm F/2.8 macro lens and the auto focus can be controlled from the computer so other than adjusting lights, and placing the coin the whole set-up is hands free and fast if you are shooting the similar coins, ie Silver dollars, when you switch to a another sized coin you may need to adjust the height of the camera to fill the shot better.

Coming from and ex-professional photographer and Canon user.

As Ray mentioned the kit will come with all the cables you need to run the live view mode to a computer screen, you WILL need a VERY sturdy mount or tripod and some lights (most of us use cheap Ikea jansjo lamps under $20.00 for a pair). Depending on where the computer is to the camera set-up you may need a USB extension cord also. I believe Canon only supplies a 5 or 6 foot cable.

Mirror lenses or cardioptric lenses are horrible for shooting macro, I don't even like them for shooting anything really. Though I do have an 11" Celestron telescope I shoot through sometimes! Those lenses even the best are just never very sharp, and they will leave ring like spots on any specular highlights. If you really want to shoot with a large telephoto lens just look into renting a good one. I used the Canon 500mm F/4 USM IS L lens for many years (always rental) still never even came close to paying rental fees that approached the cost of buying that lens at over $10,000! I did purchase a 300mm F/2.8 USM IS L and the 200mm F/1.8 USM L two of the best lenses I ever had, and am still sick over selling the 200mm F/1.8 wouldn't use either for shooting coins though. That little 100mm F/2.8 USM macro isn't the new L model but it still works great, and now the new L verision is out on the market, the prices for the older non L lens used is falling, I've seen them sell for under $400.00 on ebay - not bad for a lens that was about $800 when new.

B&H, Sammy's, Robert's Camera of Indianapolis and KEH are all good, safe, and reliable dealers to use when buying used lenses. I've used them all in the past and been quite happy.