The easiest DIY solution (that I think would look decent) would be to get some (gel) wood stain in the closest color you can find to touch up the scratches then remove the handles and do two coats of (satin finish) polyshades in a color slightly darker than the doors are now (probably bombay mahogany).

On the outside it looks like it needs new siding because it has stains and dents on it.

Cleaned up the yard, painted the shed, stained the deck, put some flower beds in the front with some edging and mulch, and planted some shrubs.

area to the right of the fireplace, with the stained-glass doors.Here's a weird idea. 

Pets can ruin carpets and flooring and stain walls.Kids who are not supervised and parented correctly can damage drywall,plug up toilets,destroy back yard landscaping,etc.They're both something you have to deal with one way or another but at least with pets you can charge a deposit!!

Stain decks.

Stain the pergola in a rust.These simple, inexpensive improvements will so completely transform the building you won't recognize it, and will attract much better tenants.

stain master luxery vinyl is vinyl.  

On a typical move-out/move-in job I had my "standard" tool box plus a materials box containing;the standard paint color I used for rentals-Navajo White, a bunch of paint stirring sticks (for sheetrock repair more than stirring paint), a couple of pieces of sheetrock 2' X 2', Elmer's glue, sheetrock screws, switch plates, a couple of outlets and switches, scrubbing stuff and chemicals, DOORSTOPS, light bulbs, mineral spirits and linseed oil and 000 steel wool for touching up stained wood, paper towels, TOILET PAPER, rags, paint brushes, SMALL LADDER, joint compound.Once you've gone through every room doing the "touch ups" you'll have a good idea if you need to come back with your 8' and extension ladders, paint rollers and 5 gallon can of paint and drop clothes.

If stain remains, apply rust remover or oxalic acid solution. 6.