Hi Kay,
I use Fleischman's Unsalted margarine which is dairy free and have had
great success baking with it. There is also Canoleo available at our health
store that bakes up fine. We use Rice Dream milk or soymilk
in recipes that say "milk".
I use semi-sweet choco chips in Canada and the ones I use have no
dairy in them. Just lucky I guess.
I bought a cookie press at a garage sale in the summer and
made spritz cookies on Friday.
Two more recipes for you.

Oatmeal Macaroon Cookies

1 c. dairyfree margarine,not diet
1 c. sugar
2/3 cup brown sugar
1/4 c. pureed soft tofu
2 1/2 cups quickoatmeal
1 c. flour
1 c. coconut
1/2 tsp. salt
1 tsp. vanilla
1/2 tsp soda dissolved in 2 T. hot water

Mix together and drop on ungreased cookies sheet and bake in
425 oven. Watch carefully, they can burn easily.
Takes about 9-10 minutes. Removes while they still look
gooey but set. Let sit a minute before removing from pan.

Sweet and easy Sugar cookies

2 cups dairyfree margarine,not diet
2 cups brown or white sugar
1/2 cup soft tofu, pureed
4-5 cups flour
4 tsp. cream of tartar
2 tsp. baking soda
1 tsp. vanilla

Cream margarine and sugar. Add vanilla and tofu.
Combine flour,cream of tartar, baking soda. Beat
into creamed mixture. Refrigerate then roll, cut and
bake at 350 until lightly brown on edges. Makes lots.