When I pulled into my drive I accidentally scraped the side of my wife's car and now there is a black line down it and some marks near the Fender. As well as a dent in my car. What is the best way to go about fixing these
Put a little of brake fluid on a clean clotch, and wipe gently the paint scratch.
The brake fluid will disolve the paint, and spread it to hide the scrape, if you overdo it you will damage your car paint.
Do it at your own risk.
Not sure where you are but there are companies who specialise in simple dent / chip repair such as this one in the UK : https://www.chipsaway.co.uk/