I can't get a 1/4" seam allowance to sew on my eden rose without jamming the bobbin for quilt piecing .

Oooh, ouch!!! Were you able to get all of the needle pieces out of the machine? Unfortunately, it may have knocked the machine out of time or bent/damaged some internal mechanism necessitating professional service.

In the future, instead of placing pins horizontally across the seam line, align them parallel with the seam edge--far enough away to clear the presser foot. Sew slower and remove the pins before they get to the presser foot. Broken needles can be dangerous to you and the machine--as you already know.

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HI,
check the video
How to Replace Sewing Machine Needles Sewing Lessons

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Your best option will be a "walking" or "even feed" foot. Your Brother dealer should have them in stock.

go to the Husqvarna Viking website to locate the nearest Viking dealer. Viking does not allow their dealers to sell parts and accessories over the internet

I have never used a machine to free motion quilt. That said, I have had issues sewing over thick seams. Since your machine runs smoothly otherwise... I think it is the thickness of the seamed area that is causing your problem. It may be too late but you could try trimming your seams so the layers fabric graduate to full thickness. Or you could use a chop stick or popcicle stick to press down on the thickness as you guide the machine over the seam. I also suggest that you Fan your seam allowances where your blocks come together. You can see how that is done here. http://www.allpeoplequilt.com/videos/v/62207505/machine-minute-bulky-intersections-fanning-seam-allowances.htm

try changing the needle
also try to adjust the tension on the presser foot bar, if your machine has one

Your question is a little vague... Put simply, here is how to make a quilt. Start by putting 2 pieces of material (good sides together) and sew a 1/4 inch seam. Keep on adding pieces until you have a quilt.

I am not sure I am following your explanation.

Set the tensions back to the factory setting.

Refer to the manual for threading instructions.

Always thread a sewing machine with the presser foot up.

Make sure the bobbin is inserted so the thread is feeding from the bobbin spool in the correct order and through the proper guides.

Hand-walk the needle down and back up while holding onto the end of the thread.

Pull up the bobbin thread and take both threads under the presser foot and to the back of the machine.

Always take the threads toward the back of the machine when you begin a new seam.

This may, or may not be contributing to the problem, but the materials you are sewing shed a lot of lint and the bobbin case, shuttle and surrounding area new frequent cleaning.

If you want to piece quilts, I recommend a 1/4" piecing foot. Husqvarna make several different types that may be used on the Rose.
If you want a dual feed or walking foot, check out the new Interchangeable Dual Feed foot.
You only use card with the Rose for embroidery, which you can do on a quilt, but not necessary.

When you turn your machine on it automatically sets up for a straight stitch with the needle centered. Just guide the right edge of your fabric along the line marked 15 on the throat plate and you'll have very close to a 5/8" seam. If you need more precision you can adjust your needle position to the left or the right by using the stitch width and mirror setting buttons.