You can get a used timing light on ebay for around $20-$30 bucks. It's a decent investment for older cars.

A cheap vacuum gauge you can pick up almost anywhere that sells automotive tools for around $15.

I've you've got a new coil, you probably can do without the spark tester.

You might try unplugging a few things and trying to start it, especially since you don't have many tools. If a particular sensor is causing problems/shorted/etc..., some cars will run if it's simply disconnected (may not work with MB's).

Is the check engine light on?

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.