badges come off easier when warm a hair dryer carefully used may get them off, or if you remove them ,the sticky residue left may come off with eucalyptis oil. Pin striping may be more difficult contact one of the stripe/graphic decal fitters for their advice.

You'll need to leave the 2 Holden lions on the car - bonnet & boot - they have locating holes under them, but the rest come off easy.

As cloudy said, a hairdryer to warm up the adhesive will help it release. There's all sorts of tricks like sliding a credit card behind them, or using fishing line as a makeshift saw. These will leave marks on the paint, but you can polish them off when you're finished.
Give it a try with your bare fingers first - they often come off easy enough once a bit of heat has been applied, so give that a try first.

I find prepsol (was & grease remover) works the best for removing the glue residue without harming the paint, and then a quick polish to blend the bright & faded paint shadow line that will remain.

Jim has covered the pinstripes - again with a bit of heat, get an end up, and you can gently work it up in one length if you work ahead a few inches at a time with the hair dryer.