Lenses to adapt to Canon 400D?

Hi all,
I have two lenses from my uncle old cameras that I would like to adapt to my Canon 400D EF.
1. MC Cimko MT Series 70-210mm f3.8 for Pentax
I was looking online and found the following adapter, but I am not sure it is the right one for this lens (is the Cimko a PK lens?): http://cgi.ebay.com/Pentax-PK-Lens-to-Canon-EOS-Adapter-EF-450D-5D-350D-40D_W0QQitemZ190291626245QQcmdZViewItemQQptZLens_Accessories?hash=item2c4e43c905&_trksid=p3286.c0.m14
2. Yashica Lens ML 50mm f1.9
I am not sure “at all” what adapter to look for and where to look for it to buy.
If you need pictures of the 2 lenses let me know.
I also have an additional question: I have a used-once Canon 20-35mm f2.8 zoom lens that I rarely use due to the focus range, could it be worth selling? As it is not in production anymore and I read it is quite a good lens, but I cannot find any indicative selling price.

Thanks in advance for all the great advices-
Valeria
thanks already – I am really looking to understand what are the right adapters I need to look for (PK to EOS is my main question, is the Cimko a PK?) I could not find info on the links sent as these 2 lenses were manual focus.