I did IVF for myself, I am pregnant now.
I would say they do IVFs and surrogacy, nothing less and nothing more, the doctor can tell and advice, they even have packages with transfer from IVF to surrogacy, if some attempts of IVF fail, you may transfer to surrogacy. In the price list they have 3 packages for IVF/egg donation and 2 for surrogacy and one package as a Transfer package from IVF to surrogacy. Here you can find the packages http://mother-surrogate.info/our-services/
In my case I wanted surrogacy, but doctor suggested me to try IVF and I agreed.
2) It depends on the specific case, I wanted on my own eggs and had to make some tests for LH and FSH, Antimuller hormone and I made also the ultrasound to see my follicles growth, to know if I am able to produce my own eggs. Some women can't go with their own eggs and doctor suggests egg donation, they have a database of young donors, every donor has children and is checked for good health and genetic diseases
http://donors.mother-surrogate.info/Oh,
they do ICSI for the fertilization in any program. They do meeting with surrogate mother, that I know for sure, because I saw it in the clinic, a couple form Germany came for an ultrasound and talked to their surrogate.
In your case it can be a poor quality of embryos, because of some physical issues, the tests can show, maybe because of your age. They transfer embryos 1-3 (blastocyst)on the 5th day. I would suggest you to contact manager Anna to biotexengland@yahoo.com, she is responsible for English-speaking clients and she has been working for a long time already and is very high informed in IVF and surrogacy, she has a direct contact to the doctor and can answer all your questions, advice and comment on your medical tests.
You are asking about "if the embryos (my own embryos - not donated ones) cannot survive in my uterus, why should they in the surrogate's uterus? If the embryos' quality is not good enough a surrogacy program probably would not make sense, would it?" It will make sense, it may be your lining in you uterus is not good, even with the help of hormonal pills, and the embryo never survives. I would suggest you to consider the 27,900 VIP package, there is one attempt with our own eggs is possible, to give a shot and if it wouldn't work, just proceed on donor's eggs. I wanted this package for me, but in any case, you should come for a consultation and decide what to do with a doctor or consult via internet with a doctor with the help of Anna. I was sending her my analysis an ultrasounds and I had a quick answer from a doctor.
My friend from Poland is in a program with them for 9,900 (one attempt on her own, the rest on donor's) with transfer to surrogacy - she tries IVF until she can and if it fails, she pays extra 18000 and goes for surrogacy.
Please write here or directly to biotex, I often mail Anna, because I have my protocol and take pills.
Have a nice baby trip!
We already have one child from BioTexCom program for surrogacy and if someone has doubts that there some problems with pass for the child, so I tell you - there no problems 
at all, here you can see our PASS for the child from German Embassy, I have marked off all name (you have to understand the privacy). 
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