Hi. My name is*****'m a camera repair technician with over 20 years in the business and I'll be glad to help you with your question today.
Although there are adapters for FD lens to EOS camera body, they are truely incompatable. The older FD lenses were completely mechanical and the EOS, (Electronic Operating System), is electronic by design. If you use an adapter on the FD lens you loose all control functions. No AF, No metering, no auto or program control and no TTL falsh. You are really much better off using a lens designed for your camera. Canon, as well as Sigma, Tamron and Tokina all have very good lenses with some in a more affordable range.
You omitted to say anything about the use of FD lenses with MILC cameras. Replacing the range of lenses I have would cost thousands.
Auto focus is not needed.
Mirrorless interchangeable-lens cameras.