cucumbers are one of the recommended plants for putting with tomatoes. Onions scattered around amongst most things help repel pests. Here's one list:
Plants Recommended for Companion Planting with Tomatoes: amaranth, asparagus, basil, bean, calendula (pot marigold), carrots, celery, chive, cleome, cosmos, cucumber, garlic, lemon balm, lettuce, marigold, mint, nasturtium, onion, parsley, peas, sage, stinging nettle and sow thistle.
Amaranth helps repel insects.
Basil repels insects and disease, improves growth and flavor. Repels mosquitoes and flies (even fruit flies).
Bee balm, chives, mint and parsley improve health and flavor. Use dill early since mature dill starts to inhibit tomato growth.
Carrots planted near tomatoes may not get as large as they should, but theyÃ¢â‚¬â„¢ll still taste good.
Garlic repels red spider mites. Garlic sprays help control late blight.
Stinging nettle nearby improves taste.
Sow thistle aids growth.
Other than what you have already, I'm having a hard time thinking of any fruit you can plant now and have fruit this year. Some dwarf blueberries are good for containers, so you could take it with you when you move. If you start with a well grown plant, you might get a few berries this year, but better next year.