I traveled out of town for medical treatment due to cancer 109km each way do I claim both ways and had parking where do I claim those and do I add them all together

Yes.  Because you had to travel at least 80KM one way for medical reasons, you can claim the cost of transportation there and back as well as your parking expenses.  You should calculate all of your eligible travel expenses and claim the total as medical expenses.  For more info, please see http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns300-350/330/llwbltrvl-eng.html